CVE-2025-5807 Gwolle Guestbook <= 4.9.2 - Unauthenticated Stored Cross-Site Scripting via `gwolle_gb_content` Parameter
Unauthenticated attackers can inject arbitrary scripts via the content parameter, leading to script execution when users view the page.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-5807?
CVE-2025-5807 is a medium-severity cross-site scripting vulnerability in mpol Gwolle Guestbook, published on 10 Jul 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Gwolle Guestbook plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘gwolle_gb_content’ parameter in all versions up to, and including, 4.9.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2025-5807?
How do I fix CVE-2025-5807?
No fix has been published for CVE-2025-5807 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-2025-5807 being exploited?
There is no known exploitation of CVE-2025-5807 in the wild and no public exploit code.
Sources
Also known as GHSA-cjh8-mmgf-6pf5.