🛡️ CVE-2023-5541 — moodle

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

• Attack vector: Local — a local account, shell or session on the host is needed.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: Required — someone has to click, open or visit something.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: None.
• Integrity impact: Low — limited, and the attacker does not choose what is affected.
• Availability impact: None.

Weakness class

CVE-2023-5541 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2023-5541 is recorded against 2 packages.

• moodle
• moodle/moodle (fixed in 4.3.0-rc2)

Timeline and source

Published on 6 March 2024 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

git.moodle.org (Web)
bugzilla.redhat.com (Web)
moodle.org (Web)
nvd.nist.gov (Web)

Other advisories for this package

moodle has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CGA-gh9j-5h6h-jq6x (published 5 Aug 2026)
• CGA-9vcc-mq55-9mmm (published 5 Aug 2026)
• CVE-2022-50943 (5.0 Medium, published 28 May 2026)
• UBUNTU-CVE-2022-50943 (published 10 May 2026)
• CVE-2025-67847 (8.0 High, published 6 Mar 2026)
• CVE-2021-47857 (5.0 Medium, published 6 Mar 2026)
• CVE-2026-26045 (8.0 High, published 2 Mar 2026)
• CVE-2026-26047 (5.0 Medium, published 2 Mar 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-79: Cross-site Scripting (XSS)) in other software:

• CVE-2011-4924 (published 9 Jul 2026)
• CVE-2017-1000482 (published 9 Jul 2026)
• CVE-2017-20182 (published 7 Jul 2026)
• CVE-2021-3988 (published 7 Jul 2026)
• CVE-2014-0157 (published 6 Jul 2026)
• CVE-2017-1000426 (published 6 Jul 2026)
• CVE-2018-25045 (published 6 Jul 2026)
• CVE-2013-2209 (published 6 Jul 2026)

CVE-2023-5541 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Affected Packages

References