CVE-2026-28561 wpForo Forum 2.4.14 Stored XSS via Unescaped Forum Description in Templates

Medium 4.8 Published 28 Feb 2026 Updated 11 May 2026

Administrators can inject persistent JavaScript via forum descriptions, allowing attackers to execute code in victim browsers.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-28561?

CVE-2026-28561 is a medium-severity cross-site scripting vulnerability in gVectors Team wpForo Forum, published on 28 Feb 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

wpForo Forum 2.4.14 contains a stored cross-site scripting vulnerability that allows administrators to inject persistent JavaScript via forum description fields echoed without output escaping across multiple theme template files. On multisite installations or with a compromised admin account, attackers set a forum description containing HTML event handlers that execute when any user views the forum listing.

Weakness: CWE-79

Which versions are affected by CVE-2026-28561?

It affects 1 product.

Products include Gvectors Wpforo Forum.

How do I fix CVE-2026-28561?

No fix has been published for CVE-2026-28561 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-2026-28561 being exploited?

There is no known exploitation of CVE-2026-28561 in the wild and no public exploit code.

Sources

Also known as GHSA-4595-c58r-mv75.