# CVE-2026-120205: Thelia before 3.1.0 Stored XSS via Coupon Condition Customer Name

Status: published. Published: 2026-10-31. Updated: 2026-11-02.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Thelia / Thelia (thelia/thelia): ≥ 0; < 3.1.0 (affected, semver). Source: CNA: VulnCheck
- Thelia / Thelia Core (thelia/core): ≥ 0; < 3.1.0 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 7.4 (high); CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 8 (high); CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.26% as of 2026-11-02; percentile 18.15%

- SSVC: exploitation poc; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-79

## Exploit evidence

- exploit: https://github.com/thelia/thelia/security/advisories/GHSA-r63g-6wfg-v5v9 (ADP: CISA-ADP)

## References

- https://github.com/thelia/thelia/security/advisories/GHSA-r63g-6wfg-v5v9 (CNA: VulnCheck; vendor-advisory)

- https://github.com/thelia/thelia/commit/c90d59375089a0833a56703c6f9f9ddea17bddc9 (CNA: VulnCheck; patch)

- https://github.com/thelia/thelia/releases/tag/3.1.0 (CNA: VulnCheck; release-notes)

- https://github.com/thelia/thelia/blob/3.0.0/core/lib/Thelia/Condition/Implementation/ForSomeCustomers.php#L119 (CNA: VulnCheck; technical-description)

- https://www.vulncheck.com/advisories/thelia-before-3.1.0-stored-xss-via-coupon-condition-customer-name (CNA: VulnCheck; third-party-advisory)

- https://github.com/thelia/thelia/security/advisories/GHSA-r63g-6wfg-v5v9 (ADP: CISA-ADP; exploit)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-120205; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-120205; retrieved 2026-11-02; source updated Not reported

Revision: c862b2552962c67d1881380ba83172b0490a6bf88efd03df56f56670ae1e1740

Canonical: https://y2.dev/cve/CVE-2026-120205

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.