Thelia before 3.1.1 contains a stored cross-site scripting vulnerability that allows authenticated back-office administrators with store…
CVE-2026-120248
Thelia before 3.1.1 contains a stored cross-site scripting vulnerability that allows authenticated back-office administrators with store update permission to inject scripts by uploading unsanitized SVG logofile or bannerfile images. Attackers can upload an SVG with an onload payload served from /admin/store-media/logo or the public cache/images/store/ directory to execute scripts against visitors and higher-privileged administrators.
Assessment
- CVSS
- 4.6 (v4.0)
- Severity
- Medium
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 1 November 2026
- Last updated
- 1 November 2026
- Affected
- Thelia · Thelia · Thelia Back-office Default Twig Template · Thelia Core
- Assigner
- VulnCheck
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
At the source
References
- https://github.com/thelia/thelia/security/advisories/GHSA-gvcv-hvpp-89gx
- https://github.com/thelia-templates/default-twig/commit/d79780eafc5b17ac75554c836a1853610d89a090
- https://github.com/thelia-templates/default-twig/commit/f690a649cbbcee9543647cb7ed5018df68f66658
- https://github.com/thelia/thelia/commit/2c691e5c3bb8536ca901fcf7d2780301bd111ba9
- https://github.com/thelia/thelia/releases/tag/3.1.1
- https://github.com/thelia-templates/default-twig/blob/6473c164bd86348f4c7d0ef6f194f1ff3d267902/src/Controller/Configuration/ConfigStoreController.php#L173-L195
- https://www.vulncheck.com/advisories/thelia-before-3.1.1-stored-xss-via-svg-store-logo-and-banner-uploads
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