WPIntell

Market

flip book

Flip Book 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.

71 / 85 rows with source links

83.5% of this page's analysis has direct source links.

0 build-decision rows missing links

0 rows here require auditable proof before promotion.

14 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

8 shown
flowpaper 10.0K installs · 3.4
weak incumbent
-100.0%momentum 56.8weakness 35/15pain/praise

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

source 1 source 2
PDF Flipbook Heyzine 1.0K installs · 0.0
watchlist
-100.0%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. 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 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 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 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 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 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. mixed Erreur lors du lancement du flipbook

Erreur lors du lancement du flipbook: users show bugs, performance, support pain that may indicate a product gap.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · Après avoir correctement paramétré le module, le système génère systématiquement cette erreur : UnknownErrorException: Bad end offset: 37388757 Quelqu’un a une idée d’où viendrait ce problème ? complaint distracting “Play”-Button (Fullscreen) on mobile

distracting “Play”-Button (Fullscreen) on mobile: users show bugs, compatibility, setup pain that may indicate a product gap.

flowpaper · distracting “Play”-Button (Fullscreen) on mobile Hi, I just installed the plugin. complaint Cover page being counted as a page

Cover page being counted as a page: users show bugs, missing feature, support pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Cover page being counted as a page Hello, I am encountering an issue with the cover page being counted as a page in the submitted flipbook. complaint PHP warning

PHP warning: users show bugs, compatibility, missing feature pain that may indicate a product gap.

flowpaper · PHP warning We’re noticing this php error from your plugin. complaint Full Pdf Not showing Only some pages are showing.

Full Pdf Not showing Only some pages are showing.: users show bugs, pricing, support pain that may indicate a product gap.

flowpaper · Is there any limitation of free version plugin pages in flow paper. complaint Not working with Thrive Apprentice

Not working with Thrive Apprentice: users show bugs, compatibility, support pain that may indicate a product gap.

flowpaper · Not working with Thrive Apprentice Does not work with Thrive Apprentice (Rise Theme). complaint This plugin does not work. Produces a blank flipbook

This plugin does not work. Produces a blank flipbook: users show bugs, support, migration pain that may indicate a product gap.

iPages – FlipBook Image & PDF Viewer · This plugin does not work. complaint Restrict access to pdf file

Restrict access to pdf file: users show pricing, support pain that may indicate a product gap.

flowpaper · If we remove the folder restriction, it works. mixed Error Cannot Access File! Bad end offset: 2149624

Error Cannot Access File! Bad end offset: 2149624: users show bugs, pricing, support pain that may indicate a product gap.

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery · Error Cannot Access File! mixed Unreal Flipbook Visual Composer Install

Unreal Flipbook Visual Composer Install: users show bugs, compatibility, support pain that may indicate a product gap.

PDF Flipbook, WPBakery Addon – Unreal FlipBook · Unreal Flipbook Visual Composer Install I am a magazine publisher going from print to digital and I’d like to use the Unreal Flipbook to showcase the work we have done for the last decade. question CORS issue

CORS issue: users show bugs, missing feature, setup pain that may indicate a product gap.

iPages – FlipBook Image & PDF Viewer · CORS issue Good day, So I see it is a cors issue that I’m having, the site is on https but the call to load the pdf is done over http The page at 'https://www.___.co.za/resources/' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://www.___.co.za/wp-content/uploads/ipages_flipbook/18/config.json?ver=1590138489'. complaint InvalidPDFException: The PDF file is empty, i.e. its size is zero bytes.

InvalidPDFException: The PDF file is empty, i.e. its size is zero bytes.: users show bugs, support pain that may indicate a product gap.

Real 3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder · I keep on getting this error message when it tries to open those PDFs: “InvalidPDFException: The PDF file is empty, i.e. complaint ipage flipbook Unexpected server response (0) while retrieving PDF

ipage flipbook Unexpected server response (0) while retrieving PDF: users show bugs, support pain that may indicate a product gap.

iPages – FlipBook Image & PDF Viewer · ipage flipbook Unexpected server response (0) while retrieving PDF Hi team, I bought the ipage flipbook plugin from Envato elements, and when I use it on my website, it gives the following error when I upload a PDF (Unexpected server response (0) while retrieving PDF). mixed Works but not fully

Works but not fully: users show bugs, compatibility pain that may indicate a product gap.

Simplebooklet PDF Viewer and Embedder · Works but not fully Yes this plugin does work, but if you have a light background you users wont see the arrow to change the page.