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CVE-2025-53021

Published: Jun 24, 2025Updated: Jul 9, 2025 Sources: CVE List NVD GHSA BDUCWE-384
4.2MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 79.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

A session fixation vulnerability in Moodle 3.x through 3.11.18 allows unauthenticated attackers to hijack user sessions via the sesskey parameter. The sesskey can be obtained without authentication and reused within the OAuth2 login flow, resulting in the victim's session being linked to the attacker's. Successful exploitation results in full account takeover. According to the Moodle Releases page, "Bug fixes for security issues in 3.11.x ended 11 December 2023." NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-384

Affected Products

Moodle
oss-project·AUaka jmol plugin, lms
MoodleOn-premWeb App
Web & CMS Plugins / cms-core
Packagist
package-ecosystem
moodle/moodleWeb App
Web & CMS Plugins / cms-core
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Мартин Догиамас
individual-dev·AUaka martin dogiamas
MoodleOn-premWeb App
Web & CMS Plugins
and 1 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Defense Evasion
Initial Access
View detailed technique mapping

References

https://github.com/moodle/moodle/releases/tag/v3.11.18
github.com
https://moodledev.io/general/releases#moodle-311
moodledev.io
https://rentry.co/moodle-oauth2-cve
rentry.co
and 5 more references View all →

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