CVE-2026-109396

Description

Thelia before 3.1.2 and 3.2.x before 3.2.1 contains a CSV formula injection vulnerability that allows unauthenticated visitors to inject spreadsheet formulas by supplying crafted registration, checkout or newsletter fields. Attackers can submit names, addresses or phone values starting with =, +, - or @ that CSVSerializer exports verbatim, executing formulas in the administrator's spreadsheet application.

References

• https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/Serializer/Serializer/CSVSerializer.php
• https://github.com/thelia/thelia/commit/6e46059225d87565caf4859ec0f764354e82ce95
• https://github.com/thelia/thelia/commit/c00a26f0631ed9de3c4466176db6e808a25034aa
• https://github.com/thelia/thelia/releases/tag/3.1.2
• https://github.com/thelia/thelia/releases/tag/3.2.1