TI-2026-83555 Aliases CVE-2026-120205 GHSA-pfq9-82gg-2grp

Stored cross-site scripting in Thelia via coupon customer names

HIGH 68CWE-79Published 2026-10-31 · Updated 2026-11-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: Present
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · High · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Thelia and Thelia Core before 3.1.0 are affected. Unescaped customer names in ForSomeCustomers::getSummary() let attackers store scripts (CWE-79). An unauthenticated attacker can inject a script through their customer name that runs when an administrator views related coupons, allowing theft of CSRF tokens to create administrator accounts.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

Thelia before 3.1.0 contains a stored cross-site scripting vulnerability in ForSomeCustomers::getSummary() that allows unauthenticated attackers to inject scripts via unescaped customer names. Attackers can register with a script payload as their name that executes when administrators view related coupons, stealing CSRF tokens to create administrator accounts.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00263 18th percentileScored 2026-11-07

Fix Fixed Thelia (Thelia): 3.1.0Thelia Core (Thelia): 3.1.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Thelia	Thelia	before 3.1.0	3.1.0	Patch available	CNA
Thelia	Thelia Core	before 3.1.0	3.1.0	Patch available	CNA

Thelia VendorThelia Affected before 3.1.0 Fixed in 3.1.0 Patch available CNA
Thelia Core VendorThelia Affected before 3.1.0 Fixed in 3.1.0 Patch available CNA

Remediation

Thelia and Thelia Core are fixed in version 3.1.0. Upgrade both products to 3.1.0 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Fix · CNA Thelia (Thelia) Fixed in 3.1.0
Fix · CNA Thelia Core (Thelia) Fixed in 3.1.0

Timeline

2026-10-31 Threatist record created from CVE-2026-120205
2026-10-31 Alias added: GHSA-pfq9-82gg-2grp
2026-11-02 Priority changed: MEDIUM → LOW
2026-11-02 CISA SSVC decision points changed
2026-11-02 Priority changed: LOW → HIGH

References

Patch 1

https://github.com/thelia/thelia/commit/c90d59375089a0833a56703c6f9f9ddea17bddc9

Advisory 1

GitHub Security Advisory (GHSA-r63g-6wfg-v5v9)

Other 2

TI-2026-83574 Cross-site request forgery in Thelia back-office product combination routes CVSS 4.0MEDIUM 6.9
TI-2026-83557 CSRF in Thelia Page Module delete routes lets attackers remove images CVSS 4.0HIGH 7.0
TI-2026-83556 Thelia back office CSRF via leaked URL tokens and unprotected actions CVSS 4.0MEDIUM 5.9
TI-2026-71031 CSV formula injection in Thelia exports lets visitors run spreadsheet formulas CVSS 4.0LOW 2.3
TI-2026-71005 Thelia translation editor flaws allow remote code execution CVSS 3.1HIGH 8.8
TI-2026-71032 Unrestricted file upload in Thelia allows PHP code execution CVSS 4.0HIGH 8.6

See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences