CVE-2024-38274VulnerabilityPublished 8 Aug 2025Updated 8 Sep 2026

CVE-2024-38274: moodle · stored XSS via calendar's event title when deleting the event

Affects moodleSource GCVE Database

Not known to be exploited · fixed in 4.4.1 : 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: 0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.4.1, 4.3.5, 4.2.8 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Aug 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 4.4.1, 4.3.5, 4.2.8 or 4.1.11.

Affected software

Product	Affected	Fixed in
Bitnamimoodle`pkg:bitnami/moodle`Other threats	Affected >=4.1.0 <4.1.11 >=4.2.0 <4.2.8 >=4.3.0 <4.3.5 >=4.4.0 <4.4.1	Fixed in 4.1.11 4.2.8 4.3.5 4.4.1

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 to Moodle versions 4.1.11 or later, 4.2.8 or later, 4.3.5 or later, or 4.4.1 or later to remediate the issue. Applying the official fixes will prevent exploitation of the stored XSS vulnerability in calendar event titles.

Description

A stored cross-site scripting (XSS) vulnerability exists in Moodle's calendar feature due to insufficient escaping of event titles in the event deletion prompt. This vulnerability affects multiple Moodle versions prior to their respective patches. Exploiting this flaw could allow an attacker to inject malicious scripts that execute in the context of a user's browser when they interact with the event deletion prompt.

Impact

The vulnerability enables stored XSS attacks via calendar event titles in Moodle, which could allow attackers to execute arbitrary scripts in the context of authenticated users interacting with the event deletion prompt. This may lead to unauthorized actions such as session hijacking or data theft within the affected Moodle instance. There are no known exploits in the wild at this time.

Summary

CVE-2024-38274 is a stored XSS vulnerability in Moodle caused by improper escaping of calendar event titles when deleting events. This flaw allows malicious scripts embedded in event titles to execute in users' browsers during the deletion confirmation, potentially leading to session hijacking or other script-based attacks. The vulnerability affects Moodle versions 4.1.0 through before 4.1.11, 4.2.0 through before 4.2.8, 4.3.0 through before 4.3.5, and 4.4.0 before 4.4.1. A patch is available to address this issue.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 8 Sep 2026, 13:43 UTC

Technical details

References

Community reviews

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