What’s Vulnerable › Vulnerabilities

CVE-2026-109397: Thelia before 3.1.2 and 3.2.x before 3.2.1 File Upload RCE via Filename Trailing Space

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-12 · updated 2026-10-13
• Weakness: CWE-434

Description

Thelia before 3.1.2 and 3.2.x before 3.2.1 contains an unrestricted file upload vulnerability that allows authenticated back-office users to upload PHP files by appending a trailing space to filenames. FileProcessorService validates the raw filename but FileManager::sanitizeFileName() strips the space, storing an executable .php file under public/cache/documents/ for code execution as the web server user.

Affected products

• Thelia: before 3.1.2; from 3.2.0 before 3.2.1 — fixed in 3.1.2, 3.2.1

How to fix

Upgrade to a fixed version: Thelia 3.1.2, 3.2.1. Check the vendor advisory for mitigations.

References

• https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/File/Service/FileProcessorService.php#L119-L160
• https://github.com/thelia/thelia/commit/6b706f5cb96e6b12d890c6d16edb1c9d1fd8191a
• https://github.com/thelia/thelia/commit/b71258902b5dd278007d0f37ddad45f76d06d5bc
• https://github.com/thelia/thelia/releases/tag/3.1.2
• https://github.com/thelia/thelia/releases/tag/3.2.1
• https://github.com/thelia/thelia/security/advisories/GHSA-5524-qfxp-33v9
• https://www.vulncheck.com/advisories/thelia-before-3.1.2-and-3.2-x-before-3.2.1-file-upload-rce-via-filename-trailing-space

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