CVE-2026-103521
CVE-2026-103521
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.
Vulnerability class: Unrestricted File Upload
Published .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-103521?
- CVE-2026-103521 is a high-severity vulnerability, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2026-10-12.
- How severe is CVE-2026-103521?
- High severity. CVSS v3 base score is 7.2 out of 10.