CVE-2025-26528VulnerabilityPublished 10 Aug 2025Updated 8 Sep 2026

CVE-2025-26528: Moodle · Stored XSS in ddimageortext question type

Affects moodleSource GCVE Database

Not known to be exploited · fixed in 4.5.2 : update moodle when convenient.

Data as of 26 Oct 2026, 06:26 UTC

Severity

Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.5.2, 4.4.6, 4.3.10 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 10 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 2026-10-26.

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 4.5.2, 4.4.6, 4.3.10 or 4.1.16.

Patches and advisories

git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-82896 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Bitnamimoodle`pkg:bitnami/moodle`Other threats	Affected >=4.1.0 <4.1.16 >=4.3.0 <4.3.10 >=4.4.0 <4.4.6 >=4.5.0 <4.5.2	Fixed in 4.1.16 4.3.10 4.4.6 4.5.2

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

AI-suggested

A patch addressing this stored XSS vulnerability is available and should be applied. The affected Moodle versions are those prior to 4.1.16, 4.3.10, 4.4.6, and 4.5.2 respectively. Administrators should upgrade to these fixed versions or later to remediate the issue.

Description

A stored cross-site scripting (XSS) vulnerability exists in the drag-and-drop onto image (ddimageortext) question type in Moodle. This issue arises due to insufficient sanitization of input, allowing malicious scripts to be stored and potentially executed when the content is viewed. The vulnerability affects multiple Moodle versions prior to their respective patches. A fix has been made available to address this sanitization deficiency.

Impact

Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts that are stored on the server and executed in the context of users viewing the affected question type. This could lead to session hijacking, defacement, or other client-side attacks. However, there are no known exploits in the wild at this time.

Summary

The drag-and-drop onto image (ddimageortext) question type in Moodle versions 4.1.0 through before 4.1.16, 4.3.0 through before 4.3.10, 4.4.0 through before 4.4.6, and 4.5.0 through before 4.5.2 contains a stored XSS vulnerability. This occurs because the input is not sufficiently sanitized, allowing malicious scripts to be stored and later executed in users' browsers. The vulnerability has been assigned CVE-2025-26528 and is rated medium severity. A patch is available and referenced in the Moodle Git repository under commit MDL-82896.

References

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