CVE-2026-103521 CVE-2026-103521
Administrative users can upload malicious PHP scripts via the document update endpoint, leading to remote code execution on the server.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-103521?
CVE-2026-103521 is a high-severity vulnerability in Thelia, published on 12 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
In Thelia v2.6.0, the document upload endpoint properly blocks the upload of executable file types, but the document update endpoint does not perform the same validation. An attacker with administrative Thelia permissions can exploit this vulnerability to upload arbitrary executable files, such as malicious PHP scripts, to achieve remote code execution on the underlying server.
Weakness: CWE-434
Which versions are affected by CVE-2026-103521?
How do I fix CVE-2026-103521?
No fix has been published for CVE-2026-103521 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-103521 being exploited?
There is no known exploitation of CVE-2026-103521 in the wild and no public exploit code.
Sources
Also known as GHSA-pmj2-2x2v-fqcm.