CVE-2026-111894 phpMyFAQ 3.2.1 before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Stored XSS via iframe data: URI
Authenticated users can inject JavaScript via iframe data URIs in phpMyFAQ, enabling phishing or redirects for other viewers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-111894?
CVE-2026-111894 is a medium-severity cross-site scripting vulnerability in thorsten phpMyFAQ, published on 17 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
phpMyFAQ 3.2.1 before 4.1.9 and 4.2.0-alpha before 4.2.0-beta contains a stored cross-site scripting vulnerability that allows authenticated content authors to inject JavaScript by embedding iframes with data:text/html sources in FAQ or News content. Attackers can bypass the hostless media-host allowlist in FaqHelper::cleanUpContent(), which is rendered via Twig's raw filter, to run phishing interfaces or top-frame redirects for viewers.
Weakness: CWE-79
Which versions are affected by CVE-2026-111894?
How do I fix CVE-2026-111894?
No fix has been published for CVE-2026-111894 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-2026-111894 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111894 exists.
Sources
Also known as GHSA-fg92-v5rr-4xjq, GHSA-wwmv-7qmx-vxv3.