WPIntell

Market

flipbook

Flipbook matters only if the evidence supports a paid workflow around keeping media embeds, galleries, watermarks, and video experiences reliable, not a list of isolated fixes. The current commercial thesis is: Media-heavy sites lose engagement when embeds, players, thumbnails, or asset workflows break. The entry wedge is to monitor media embeds, player failures, thumbnail quality, and branded asset workflows before visitors notice.

Proof Health

Open evidence

Commercial opportunities need traceable source links before they are treated as build-worthy.

78 / 96 rows with source links

81.2% of this page's analysis has direct source links.

0 build-decision rows missing links

0 rows here require auditable proof before promotion.

18 rows with no attached evidence

0 rows have source counts but still need direct links.

Opportunity Summary

Full report

Build a media publishing and video operations plugin for publishers, creators, agencies, and media-heavy site owners: Media-heavy sites lose engagement when embeds, players, thumbnails, or asset workflows break. The first wedge is to monitor media embeds, player failures, thumbnail quality, and branded asset workflows before visitors notice.

The unmet need is not the individual complaint. It is the recurring business workflow: Media-heavy sites lose engagement when embeds, players, thumbnails, or asset workflows break. Current stage: commercial watchlist.

Competitors

16 shown
Issuu PDF Sync 900 installs · 2.3
praise owner
-24.1%momentum 82.0weakness 22/5pain/praise

Pain still appears around support, bugs despite praise for value, easy.

source 1 source 2
flowpaper 10.0K installs · 3.3
weak incumbent
-62.6%momentum 57.6weakness 35/14pain/praise

Pain still appears around support, bugs despite praise for quality, reliable.

source 1 source 2
Free PDF to Flipbook 400 installs · 5.0
rising challenger
100.0%momentum 21.9weakness 2/6pain/praise

Pain still appears around bugs, support despite praise for easy, value.

source 1 source 2
FlippingBook 2.0K installs · 4.0
praise owner
-18.2%momentum 47.3weakness 9/3pain/praise

Pain still appears around support, missing feature despite praise for reliable, value.

source 1 source 2
rising challenger
33.0%momentum 39.2weakness 2/0pain/praise

Open gap: users report compatibility, bugs without a matching collected praise theme.

source 1
Publuu Flipbook 0 installs · 0.0
rising challenger
113.7%momentum 11.2weakness 0/0pain/praise

Rising challenger: downloads moved 113.7% versus the previous 30 days.

ChimpJar Flipbook Maker 0 installs · 0.0
rising challenger
100.0%momentum 9.3weakness 0/0pain/praise

Rising challenger: downloads moved 100.0% versus the previous 30 days.

PDF Flipbook Heyzine 1.0K installs · 0.0
watchlist
-9.2%momentum 34.1weakness 0/0pain/praise

Weakness evidence: stale update history.

source 1

Evidence

Open evidence explorer
complaint Broken access control – plugin vulnerability

Broken access control – plugin vulnerability: users show security, bugs, missing feature pain that may indicate a product gap.

DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer · Broken access control – plugin vulnerability Hi there, In version 2.4.27 of a free plugin version of 3DearFlip app our Patchstack monitoring service revealed a vulnerability: Broken Access Control A broken access control issue refers to a missing authorization, authentication or nonce token check in a function that could lead to an unprivileged user to execu complaint Can dFLIP hide or protect the original PDF source URL, like Calaméo?

Can dFLIP hide or protect the original PDF source URL, like Calaméo?: users show security, compatibility, missing feature pain that may indicate a product gap.

DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer · Hello, I am currently using dFLIP / DearFlip on my WordPress website to display PDF magazines in flipbook format. complaint Paid users cannot get support

Paid users cannot get support: users show bugs, missing feature, pricing pain that may indicate a product gap.

flowpaper · Paid users cannot get support I bought the Creative licence for $145 just to discover that the promised deeplinking is not working with WordPress plugin. complaint Not syncing or displaying

Not syncing or displaying: users show security, bugs, compatibility pain that may indicate a product gap.

Issuu PDF Sync · Thank for your time and help! complaint Wordfence vulnerability alert for 2.4.28

Wordfence vulnerability alert for 2.4.28: users show security, bugs, support pain that may indicate a product gap.

DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer · Wordfence vulnerability alert for 2.4.28 Wordfence warning: WordPress DearFlip plugin <= 2.4.28 – Broken Access Control vulnerability Wordfence warning: WordPress DearFlip plugin <= 2.4.28 – Broken Access Control vulnerability I’m getting this vulnerability notification as well. mixed Wordfence Identified Vulnerability

Wordfence Identified Vulnerability: users show security, bugs, missing feature pain that may indicate a product gap.

DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer · Wordfence Identified Vulnerability Wordfence has identified a vulnerability with the 3D FlipBook – Lite Edition. mixed Fatal error when trying to edit PDF settings

Fatal error when trying to edit PDF settings: users show bugs, compatibility, missing feature pain that may indicate a product gap.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · Fatal error when trying to edit PDF settings Hi again. complaint There has been a critical error on this website

There has been a critical error on this website: users show bugs, compatibility, support pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · There has been a critical error on this website Help! complaint Further development

Further development: users show bugs, compatibility, support pain that may indicate a product gap.

Yumpu E-Paper publishing · The page I need help with: [ log in to see the link] A new version was last made available for the plugin 10 months ago. complaint Plugin Does not work – No response

Plugin Does not work – No response: users show bugs, support, setup pain that may indicate a product gap.

Yumpu E-Paper publishing · Plugin Does not work – No response Critical error. complaint Plugin caused a critical error on my website

Plugin caused a critical error on my website: users show bugs, missing feature, support pain that may indicate a product gap.

Yumpu E-Paper publishing · Plugin caused a critical error on my website Hi, the plugin caused a critical error on my website. complaint Critical Error on my website

Critical Error on my website: users show bugs, compatibility, support pain that may indicate a product gap.

Yumpu E-Paper publishing · Critical Error on my website Hey everyone, just checked my clients website and I wanted to upload a document to Yumpu. complaint Undefined array key – flowpaper.php on line 288

Undefined array key – flowpaper.php on line 288: users show security, bugs, compatibility pain that may indicate a product gap.

flowpaper · Undefined array key – flowpaper.php on line 288 Hi, I saw this error in the modsecurity log: AH01071: Got error ‘PHP message: PHP Warning: Undefined array key 0 in /jimfg.com/httpdocs/wp-content/plugins/flowpaper-lite-pdf-flipbook/flowpaper.php on line 288’, referer: https://flowpaper.com/ I am not very technical but does this need to be addressed? complaint Deny direct call of PHP files

Deny direct call of PHP files: users show security, bugs, compatibility pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Deny direct call of PHP files I wondered about some error messages in my PHP error log that reappeared from time to time. mixed Activation error on new site

Activation error on new site: users show bugs, compatibility, pricing pain that may indicate a product gap.

iPages – FlipBook Image & PDF Viewer · Activation error on new site We’ve been building on a dev box and have a license for your pro version. complaint Doesn`t work

Doesn`t work: users show bugs, support pain that may indicate a product gap.

iPages – FlipBook Image & PDF Viewer · Doesn`t work after producing a book and using the code on a page, no book to see and support isn’t available at all! mixed Exposure of Sensitive Information to an Unauthorized Actor

Exposure of Sensitive Information to an Unauthorized Actor: users show security, bugs, support pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Exposure of Sensitive Information to an Unauthorized Actor Please fix the security issue immediately. mixed Security vulnerability in 1.16.16 version

Security vulnerability in 1.16.16 version: users show security, bugs, support pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Security vulnerability in 1.16.16 version Hello there, https://patchstack.com is warning about a Sensitive Data Exposure vulnerability. mixed Money back

Money back: users show bugs, missing feature, support pain that may indicate a product gap.

iPages – FlipBook Image & PDF Viewer · I don’t want to go into the systmm to find a CORS or whatever error. mixed Analytics

Analytics: users show missing feature, pricing, support pain that may indicate a product gap.

DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer · Before making a decision, I would like to clarify a few points: Analytics – I see that your plugin integrates with Google Analytics, but could you please tell me more about the depth of reporting available? complaint IONOS has reported a vulnerability

IONOS has reported a vulnerability: users show security, bugs pain that may indicate a product gap.

DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer · IONOS has reported a vulnerability I see that others have said they have had warnings about this plug-in. complaint Waste of Time – Dead Plugin

Waste of Time – Dead Plugin: users show bugs, support pain that may indicate a product gap.

Yumpu E-Paper publishing · Waste of Time – Dead Plugin No response from author to critical error, by several support tickets. complaint Malware Flag – false positive?

Malware Flag – false positive?: users show security, compatibility pain that may indicate a product gap.

flowpaper · Malware Flag – false positive? complaint Security risk flagged for Realistic 3D FlipBook v4.19.2

Security risk flagged for Realistic 3D FlipBook v4.19.2: users show security, bugs pain that may indicate a product gap.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · Security risk flagged for Realistic 3D FlipBook v4.19.2 Hi, My security scanner flagged Realistic 3D FlipBook (version 4.19.2) as a potential security risk on my WordPress site. mixed Security tip: Add ABSPATH check in 3D FlipBook plugin

Security tip: Add ABSPATH check in 3D FlipBook plugin: users show security, bugs, compatibility pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Security tip: Add ABSPATH check in 3D FlipBook plugin Hi there, I noticed a small security issue in the 3D FlipBook plugin. mixed Analytics

Analytics: users show missing feature, pricing, support pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Analytics Hi, I am researching a plugin for our B2B magazine website, but before committing to one, could you please clarify a few things: Analytics – I see that your plugin integrates with Google Analytics, but could you please tell me more about the depth of reporting available? complaint Critical error in backend

Critical error in backend: users show bugs pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Critical error in backend Hi, I’m getting a critical error when trying to view any of the plugin pages. praise Good plugin but its not free version

Good plugin but its not free version: users show bugs, compatibility, missing feature pain that may indicate a product gap.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · Good plugin but its not free version Is good plugin Is good plugin Message for oscarminipro: I’d like to use R3DFB to sell eBooks on WordPress site with Woocommerce – but not sure if it can 1. praise Issuu? Forget it! *This* is what you need!

Issuu? Forget it! *This* is what you need!: users show security, bugs, compatibility pain that may indicate a product gap.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · We also know that Issuu is a paid service. neutral <= 4.16.4 is vulnerable to Broken Access Control

<= 4.16.4 is vulnerable to Broken Access Control: users show security, bugs, performance pain that may indicate a product gap.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · <= 4.16.4 is vulnerable to Broken Access Control Per Patchstack: https://patchstack.com/database/wordpress/plugin/real3d-flipbook-lite/vulnerability/wordpress-real-3d-flipbook-plugin-4-16-4-broken-access-control-vulnerability Per Patchstack: https://patchstack.com/database/wordpress/plugin/real3d-flipbook-lite/vulnerability/wordpress-real-3d-flipbook-plugin- neutral Version 4.19 Broken.

Version 4.19 Broken.: users show bugs, compatibility, missing feature pain that may indicate a product gap.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · Version 4.19 Broken. praise Why is there a critical issue in the lite version

Why is there a critical issue in the lite version: users show security, bugs pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Why is there a critical issue in the lite version I got a message from wordpress.org that there is a critical issue with the lite version on September 27th 2025, what is being done about that? neutral FYI: Error loading config.json

FYI: Error loading config.json: users show security, bugs, missing feature pain that may indicate a product gap.

iPages – FlipBook Image & PDF Viewer · FYI: Error loading config.json 403 forbidden error for the file config.json in the uploads folder. neutral Envato Elements Version is not up-to-date

Envato Elements Version is not up-to-date: users show security, bugs, support pain that may indicate a product gap.

iPages – FlipBook Image & PDF Viewer · Envato Elements Version is not up-to-date As of 12/6/23 latest version available on Envato Elements is 1.4.7 – that’s four versions behind – and there’s a security vulnerability that has been addressed since! neutral conflict with object cache

conflict with object cache: users show bugs, compatibility, support pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · conflict with object cache Hi! neutral 4.19.1 – Broken Access Control vulnerability

4.19.1 – Broken Access Control vulnerability: users show security, bugs pain that may indicate a product gap.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · 4.19.1 – Broken Access Control vulnerability Patch Stack still report a vulnerability issue: CVSS Score3.8 WordPress Real 3D FlipBook plugin <= 4.19.1 – Broken Access Control vulnerability -Vulnerability type: Broken Access Control -No Update Available Please investigate it and clarify it with PatchStack. complaint Flipbook too big to upload. FTP not working

Flipbook too big to upload. FTP not working: users show bugs, missing feature, support pain that may indicate a product gap.

FlippingBook · I try the other options on the Flipbook plugin page ‘Add New Book’ on my wordpress dashboard but I can’t get anything to work. complaint Pages not showing when PDF have double pages

Pages not showing when PDF have double pages: users show bugs, missing feature, support pain that may indicate a product gap.

flowpaper · Pages not showing when PDF have double pages Hello, This plugin would be really good if there wasn’t an important bug: it works fine when the PDF have independent pages, but when it has double pages, there is a problem. complaint Bad end offset error when using PDF files over 1MB

Bad end offset error when using PDF files over 1MB: users show bugs, compatibility, performance pain that may indicate a product gap.

DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer · Bad end offset error when using PDF files over 1MB Hello. complaint Shortcake Not Rendering

Shortcake Not Rendering: users show bugs, compatibility, missing feature pain that may indicate a product gap.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · Shortcake Not Rendering Hi, the shortcode isn’t rendering anything, I don’t see any errors in developer log, nothing is appearing in regular log, and the shortcode isn’t registered in functions.php.