# CVE-2026-120249: Thelia Back-office Default Twig Template before 1.1.1 CSRF via Product Combination Routes

Status: published. Published: 2026-11-01. Updated: 2026-11-02.

Thelia Back-office Default Twig Template before 1.1.1 contains a cross-site request forgery vulnerability in the /admin/product/combinations/update and /admin/product/default-price/update routes, which accept GET requests without anti-CSRF token checks. Attackers can lure a logged-in administrator into following a crafted link to rewrite product combination prices, stock, weight, EAN and sale flags, zeroing omitted prices.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/thelia-templates/default-twig/commit/aaf540ca552dbc4c63dca77620af4b7936d22e8f
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/thelia-templates/default-twig/commit/51b014b06a5b4ee45f15093aa58a3064d4412bd3

## Affected products and versions

- Thelia / Thelia Back-office Default Twig Template (thelia/backoffice-default-twig-template): ≥ 0; < 1.1.1 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N; source: CNA: VulnCheck

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/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; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.14% as of 2026-11-02; percentile 3.64%

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

- Weaknesses: CWE-352

## Exploit evidence

- exploit: https://github.com/thelia/thelia/security/advisories/GHSA-j2c3-9c4q-c2ch (ADP: CISA-ADP)

## References

- https://github.com/thelia/thelia/security/advisories/GHSA-j2c3-9c4q-c2ch (CNA: VulnCheck; vendor-advisory, third-party-advisory)

- https://github.com/thelia-templates/default-twig/commit/aaf540ca552dbc4c63dca77620af4b7936d22e8f (CNA: VulnCheck; patch)

- https://github.com/thelia-templates/default-twig/commit/51b014b06a5b4ee45f15093aa58a3064d4412bd3 (CNA: VulnCheck; patch)

- https://github.com/thelia-templates/default-twig/blob/6473c164bd86348f4c7d0ef6f194f1ff3d267902/src/Controller/Catalog/ProductAdvancedController.php#L546-L599 (CNA: VulnCheck; technical-description)

- https://www.vulncheck.com/advisories/thelia-back-office-default-twig-template-before-1.1.1-csrf-via-product-combination-routes (CNA: VulnCheck; third-party-advisory)

- https://github.com/thelia/thelia/security/advisories/GHSA-j2c3-9c4q-c2ch (ADP: CISA-ADP; exploit)

- https://github.com/thelia-templates/default-twig/blob/6473c164bd86348f4c7d0ef6f194f1ff3d267902/src/Controller/Catalog/ProductAdvancedController.php#L546-L599 (disclosure@vulncheck.com)

- https://github.com/thelia-templates/default-twig/commit/51b014b06a5b4ee45f15093aa58a3064d4412bd3 (disclosure@vulncheck.com)

- https://github.com/thelia-templates/default-twig/commit/aaf540ca552dbc4c63dca77620af4b7936d22e8f (disclosure@vulncheck.com)

- https://github.com/thelia/thelia/security/advisories/GHSA-j2c3-9c4q-c2ch (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/thelia-back-office-default-twig-template-before-1.1.1-csrf-via-product-combination-routes (disclosure@vulncheck.com)

- https://github.com/thelia/thelia/security/advisories/GHSA-j2c3-9c4q-c2ch (134c704f-9b21-4f2e-91b3-4a467353bcc0)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-120249; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-120249; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-120249; retrieved 2026-11-02; source updated Not reported

Revision: 0975d8ecc13dcd7f6b4064d149a79c3968d733e7d9d618adb0ab4ebebf53800b

Canonical: https://y2.dev/cve/CVE-2026-120249

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- 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.

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