CVE-2026-14835 SOGO Add Script to Individual Pages Header Footer <= 3.9 - Contributor+ Stored XSS via Post Metabox
Contributors can inject malicious scripts via post metaboxes, leading to stored XSS that executes in admin and visitor 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-2026-14835?
CVE-2026-14835 is a medium-severity cross-site scripting vulnerability in Unknown SOGO Add Script to Individual Pages Header Footer, published on 30 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The SOGO Add Script to Individual Pages Header Footer WordPress plugin through 3.9 does not sanitise or escape the custom header/footer script values saved from its post metabox, and does not restrict them to users with the unfiltered_html capability, allowing users with contributor-level access and above to store JavaScript that executes in the browser of any administrator who reviews the post and of any visitor once the post is published.
Weakness: CWE-79
Which versions are affected by CVE-2026-14835?
How do I fix CVE-2026-14835?
No fix has been published for CVE-2026-14835 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-2026-14835 being exploited?
There is no known exploitation of CVE-2026-14835 in the wild and no public exploit code.
Sources
Also known as GHSA-rmh2-mrxf-cjqv.