CVE-2026-21431 Emlog vulnerable to stored Cross-site Scripting via image name
Attackers can inject malicious scripts via image names in the media library, potentially compromising user sessions and site integrity.
- 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-2026-21431?
CVE-2026-21431 is a low-severity cross-site scripting vulnerability in Emlog Emlog, published on 2 Jan 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
Emlog is an open source website building system. Version 2.5.23 has a stored cross-site scripting vulnerability in the `Resource media library ` function while publishing an article. As of time of publication, no known patched versions are available.
Weakness: CWE-79
Which versions are affected by CVE-2026-21431?
It affects 1 product.
Products include Emlog Emlog.
How do I fix CVE-2026-21431?
No fix has been published for CVE-2026-21431 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-2026-21431 being exploited?
There is no known exploitation of CVE-2026-21431 in the wild and no public exploit code.
Other vulnerabilities in Emlog Emlog
Sources
Also known as GHSA-9vc2-crhr-248x.