CVE-2026-8625 Dear Flipbook <= 2.4.30 - Authenticated (Contributor+) Stored Cross-Site Scripting via '.df-element' Element Inner HTML
Authenticated contributors can inject arbitrary scripts via Custom HTML blocks in Dear Flipbook, leading to stored XSS execution for other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8625?
CVE-2026-8625 is a medium-severity cross-site scripting vulnerability in dearhive DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer, published on 5 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Dear Flipbook – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'post_content (Custom HTML block inner HTML)' parameter in all versions up to, and including, 2.4.30 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. A Contributor-level attacker can insert a crafted .df-element div with data-df-lightbox='thumb' via a Custom HTML block, whose inner HTML is passed as the title argument to parseThumbs() at render time, enabling both innerHTML injection into a span element and attribute breakout via an onerror handler on a constructed img element.
Weakness: CWE-79
Which versions are affected by CVE-2026-8625?
How do I fix CVE-2026-8625?
No fix has been published for CVE-2026-8625 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-8625 being exploited?
There is no known exploitation of CVE-2026-8625 in the wild and no public exploit code.
Sources
Also known as GHSA-7vxj-qhff-f4pc.