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.
References8
- github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/Serial…
- github.com/thelia/thelia/commit/6e46059225d87565caf4859ec0f7643…
- github.com/thelia/thelia/commit/c00a26f0631ed9de3c4466176db6e80…
- github.com/thelia/thelia/releases/tag/3.1.2
- github.com/thelia/thelia/releases/tag/3.2.1
- github.com/thelia/thelia/security/advisories/GHSA-gcgv-f8rf-w2wc
- www.vulncheck.com/advisories/thelia-before-3.1.2-and-3.2-x-befo…
- github.com/thelia/thelia/security/advisories/GHSA-gcgv-f8rf-w2wc
Metrics
- CVSS 3.1
-
4.2
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N - CVSS 4.0
-
2.3
LOW
Score source: CNA
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 14 · as of 11 November 2026
- CWE
- CWE-1236
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.