CVE-2025-26529

Stored XSS risk in admin live log

8.3 HighPublic exploitFix available

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.52%Up 0.5 points since Feb 27, 2025

What each source reports

CVE List Score used 8.3

Stored XSS risk in admin live log

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

Record: CVE-2025-26529
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2025-4274 8.3

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

Record: EUVD-2025-4274
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-wr88-x8cm-7cgq 8.3

Moodle has a stored XSS risk in admin live log

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

Record: GHSA-wr88-x8cm-7cgq
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Weakness: CWE-79
Updated: 2026-11-02

NVD 8.3

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

Record: CVE-2025-26529
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV 8.3

Stored XSS risk in admin live log

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

Record: CVE-2025-26529
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Weakness: CWE-79
Updated: 2026-11-02

OSVGHSA-wr88-x8cm-7cgq 8.3

Moodle has a stored XSS risk in admin live log

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

Record: GHSA-wr88-x8cm-7cgq
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Weakness: CWE-79
Updated: 2026-11-02

OSVUBUNTU-CVE-2025-26529 8.3

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

Record: UBUNTU-CVE-2025-26529
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVBIT-moodle-2025-26529 No score

Stored XSS risk in admin live log

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

Record: BIT-moodle-2025-26529
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`moodle/moodle` Packagist	4.5.0-beta up to 4.5.2	4.5.2
`moodle/moodle` Packagist	4.4.0-beta up to 4.4.6	4.4.6
`moodle/moodle` Packagist	4.3.0-beta up to 4.3.10	4.3.10
`moodle/moodle` Packagist	before 4.1.16	4.1.16
`moodle` Bitnami	4.1.0 up to 4.1.16, 4.3.0 up to 4.3.10, 4.4.0 up to 4.4.6, 4.5.0 up to 4.5.2	4.1.164.3.104.4.64.5.2
`moodle/moodle` Packagist	4.5.0-beta up to 4.5.2, plus listed versions v4.5.0v4.5.0-betav4.5.0-rc1v4.5.0-rc2v4.5.1	4.5.2
`moodle/moodle` Packagist	4.4.0-beta up to 4.4.6, plus listed versions v4.4.0v4.4.0-betav4.4.0-rc1v4.4.0-rc2v4.4.1 Show 4 moreShow less v4.4.2v4.4.3v4.4.4v4.4.5	4.4.6
`moodle/moodle` Packagist	4.3.0-beta up to 4.3.10, plus listed versions v4.3.0v4.3.0-betav4.3.0-rc1v4.3.0-rc2v4.3.1 Show 8 moreShow less v4.3.2v4.3.3v4.3.4v4.3.5v4.3.6v4.3.7v4.3.8v4.3.9	4.3.10
`moodle/moodle` Packagist	before 4.1.16, plus listed versions v2.3.10v2.3.11v2.3.4v2.3.5v2.3.6 Show 45 moreShow less v2.3.7v2.3.8v2.3.9v2.4.0v2.4.0-rc1v2.4.1v2.4.10v2.4.11v2.4.2v2.4.3v2.4.4v2.4.5v2.4.6v2.4.7v2.4.8v2.4.9v2.5.0v2.5.0-betav2.5.0-rc1v2.5.1v2.5.2v2.5.3v2.5.4v2.5.5v2.5.6v2.5.7v2.5.8v2.5.9v2.6.0v2.6.0-betav2.6.0-rc1v2.6.1v2.6.10v2.6.11v2.6.2v2.6.3v2.6.4v2.6.5v2.6.6v2.6.7v2.6.8v2.6.9v2.7.0v2.7.0-betav2.7.0-rc1	4.1.16
`moodle` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 2.7.9+dfsg-12.7.10+dfsg-12.7.11+dfsg-12.7.11+dfsg-22.7.12+dfsg-13.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1	None known
`moodle` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 3.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1	None known

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	Astroo18/PoC-CVE-2025-26529	2025-04-12
PoC in GitHub	hxuu/moodle-cve	2025-06-20

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-26529 is a high vulnerability (CVSS 8.3) in Moodle, published February 24, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.52%, the 44th percentile. Fixed in moodle/moodle 4.5.2.

References

This page doesn't list everything

Left out here: 298 versions. The JSON record has them.