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.

74 / 90 rows with source links

82.2% of this page's analysis has direct source links.

0 build-decision rows missing links

0 rows here require auditable proof before promotion.

16 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

13 shown
Issuu PDF Sync 900 installs · 2.3
praise owner
-96.4%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 · 3.4
weak incumbent
-93.7%momentum 56.8weakness 35/15pain/praise

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

source 1 source 2
FlippingBook 2.0K installs · 4.0
praise owner
-94.1%momentum 47.3weakness 9/3pain/praise

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

source 1 source 2
Free PDF to Flipbook 400 installs · 5.0
praise owner
-97.9%momentum 22.1weakness 2/7pain/praise

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

source 1 source 2
PDF Flipbook Heyzine 1.0K installs · 0.0
watchlist
-97.1%momentum 16.2weakness 0/0pain/praise

Watch for positioning evidence as more conversations are collected.

source 1

Evidence

Open evidence explorer
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! mixed 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 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 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. complaint 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? complaint Exposure of Sensitive Information to an Unauthorized Actor

A user reports a Wordfence sensitive-information exposure warning and needs a fix, while the developer says Patchstack has not provided details.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · vulnerable to Sensitive Information Exposure 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 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 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. 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? 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. mixed 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 PDF Medias list blank and connexion lost

After about 100 flipbooks, Real 3D Flipbook's media picker goes blank and times out, preventing creation of new flipbooks.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · after that it’s impossible to create a new one complaint Authenticated (Contributor+) Stored Cross-Site Scripting – CVE-2025-69019

The user asks whether the plugin author will patch an exploitable CVE flagged by Wordfence, with no vendor response in the thread.

FlippingBook · Are you going to patch your exploitable plugin? complaint conflict with object cache

3D FlipBook throws a fatal error with Docket Cache object caching, and the user supplied a working code patch.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Fatal error: Uncaught TypeError: unserialize(): Argument #1 ($data) must be of type string, array given 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. complaint flipbook disappeared

After the latest update, the user's PDF flipbook disappeared from the page despite the theme, plugins, and WordPress being updated.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · After the last update, I can’t see the pdf on my page complaint There has been a critical error on this website

3D FlipBook throws a fatal argument-count error during admin page loading, likely involving a conflict with Extendify notifications.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Too few arguments to function iberezansky\fb3d\pro_notice_render() 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- complaint Version 4.19 Broken.

Real 3D Flipbook 4.19 caused a critical error on pages using its shortcode, then shipped a 4.19.1 fix.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · when visiting the page with shortcode on it. 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! 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 Needs Paid Account

Needs Paid Account: users show bugs, missing feature, pricing pain that may indicate a product gap.

Yumpu E-Paper publishing · Needs Paid Account Plugin description says required Yumpu account is free, but on entering API key from this free account get the error message “To use this feature, you must be a paid user” This seems misleading to me. complaint Hardcoded http links generate errors on secure (https) website

Hardcoded http links generate errors on secure (https) website: users show bugs, compatibility, missing feature pain that may indicate a product gap.

Issuu PDF Sync · Hardcoded http links generate errors on secure (https) website Hello! complaint ISSUE SYNC "An error occured during synchronisation with Issuu"

ISSUE SYNC "An error occured during synchronisation with Issuu": users show bugs, missing feature, support pain that may indicate a product gap.

Issuu PDF Sync · ISSUE SYNC "An error occured during synchronisation with Issuu" Hello. complaint Does not Work

Does not Work: users show bugs, compatibility, support pain that may indicate a product gap.

Ultimate PDF Flipbooks | Flip Books Made Easy! · Does not Work This does not work….happy to change my review if you can address this. complaint Synchronization error with WooCommerce

Synchronization error with WooCommerce: users show bugs, compatibility, support pain that may indicate a product gap.

Issuu PDF Sync · Synchronization error with WooCommerce Hello team, We are using Woocommerce’s plug-in in addition to the Issuu’s system and we have a little problem. complaint Including issue in a WP article with short code stopped working

Including issue in a WP article with short code stopped working: users show bugs, compatibility, support pain that may indicate a product gap.

Issuu PDF Sync · Including issue in a WP article with short code stopped working Hi, I used to use issue shortcode in my WP posts (using Issuu plugin) [pdf issuu_pdf_id=”181211232514-557841599ce4451ba34b829b63dba26c” layout=”2″ width=”578″ height=”389″ allow_full_screen_=”1″ flip_timelaps=”6000″ ] It seems that this code stopped working a few months ago (with the last update complaint Can’t load this PDF. Make sure the PDF exists ..

Can’t load this PDF. Make sure the PDF exists ..: users show bugs, compatibility, setup pain that may indicate a product gap.

flowpaper · Make sure the PDF exists at the URL you’re loading it from.’ Nothing has changed on my setup.