CVE-2024-34000VulnerabilityPublished 31 May 2025Updated 8 Sep 2026

CVE-2024-34000: moodle · stored XSS in lesson overview report via user ID number

Affects moodleSource GCVE Database

Not known to be exploited · fixed in 4.3.4 : update moodle when convenient.

Data as of 25 Oct 2026, 19:02 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.4% chance of exploitation in 30 days – higher than 42% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.3.4, 4.2.7, 4.1.10

Exploitation evidence

Disclosed: evidence found.
CVE published 31 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade moodle to 4.3.4, 4.2.7 or 4.1.10.

Affected software

Product	Affected	Fixed in
Bitnamimoodle`pkg:bitnami/moodle`Other threats	Affected <4.1.10 >=4.2.0 <4.2.7 >=4.3.0 <4.3.4	Fixed in 4.1.10 4.2.7 4.3.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available for this vulnerability. Users should upgrade affected Moodle installations to versions 4.1.10 or later, 4.2.7 or later, or 4.3.4 or later to remediate the issue. Applying these official fixes will prevent exploitation of the stored XSS vulnerability.

Description

A stored cross-site scripting (XSS) vulnerability exists in Moodle's lesson overview report due to insufficient sanitization of user ID numbers. This flaw allows malicious scripts to be stored and potentially executed when the lesson overview report is viewed. The vulnerability affects multiple Moodle versions prior to specific patched releases. A patch is available to address this issue. No known exploits are currently reported in the wild.

Impact

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the affected Moodle instance when users view the lesson overview report. This could lead to session hijacking, defacement, or other script-based attacks. However, no active exploitation in the wild has been reported.

Summary

CVE-2024-34000 is a stored XSS vulnerability in Moodle affecting the lesson overview report. The issue arises because ID numbers displayed in this report were not properly sanitized, allowing attackers to inject malicious scripts that persist in the system. This vulnerability affects Moodle versions prior to 4.1.10, versions from 4.2.0 up to but not including 4.2.7, and versions from 4.3.0 up to but not including 4.3.4. The vulnerability has been assigned a medium severity rating. A patch is available to remediate the issue.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 8 Sep 2026, 13:44 UTC

Technical details

References

Community reviews

Related threats