Description
Thelia before 3.1.5 and 3.2.x before 3.2.4 contains a business logic vulnerability that allows authenticated customers to bypass coupon usage limits because usage is counted only when orders become paid. Attackers can place multiple pay-later orders while a usage remains, or cancel paid orders to inflate max_usage, gaining unlimited discounts.
References9
- github.com/thelia/thelia/blob/3.2.3/core/lib/Thelia/Action/Coup…
- github.com/thelia/thelia/blob/3.2.3/core/lib/Thelia/Domain/Prom…
- github.com/thelia/thelia/blob/3.2.3/core/lib/Thelia/Domain/Prom…
- github.com/thelia/thelia/commit/1c3ed9c7ad57fec8ea959aa2d2f506f…
- github.com/thelia/thelia/commit/edb7078bfce5ea31b40868d340b0b49…
- github.com/thelia/thelia/releases/tag/3.1.5
- github.com/thelia/thelia/releases/tag/3.2.4
- github.com/thelia/thelia/security/advisories/GHSA-pq5m-7g9w-ppg8
- www.vulncheck.com/advisories/thelia-before-3.1.5-and-3.2.4-coup…
Metrics
- CVSS 3.1
-
4.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - CVSS 4.0
-
5.3
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/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: 22 · as of 10 November 2026
- CWE
- CWE-837
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.