VulnerabilityPublished 12 Aug 2025Updated 10 Sep 2026

CVE-2025-26530: Moodle · Reflected XSS via question bank filter

Affects moodleSource GCVE Database

Not known to be exploited · fixed in 4.5.2 : patch moodle soon.

Data as of 26 Oct 2026, 17:16 UTC

Severity

High

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 29% 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

Exploitation evidence

Disclosed: evidence found.
CVE published 12 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 26 Oct 2026.

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 or the CVSS exploit maturity 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 or 4.3.10.

Patches and advisories

git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-84146 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Bitnamimoodle`pkg:bitnami/moodle`Other threats	Affected >=4.3.0 <4.3.10 >=4.4.0 <4.4.6 >=4.5.0 <4.5.2	Fixed in 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 is available and should be applied to affected Moodle installations. The fix is included in versions 4.3.10 and later, 4.4.6 and later, and 4.5.2 and later. Administrators should update to these versions to remediate the vulnerability.

Description

The question bank filter required additional sanitizing to prevent a reflected XSS risk.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the victim's browser when interacting with the question bank filter. This may lead to session hijacking, information disclosure, or other typical reflected XSS impacts. No known exploits in the wild have been reported.

Summary

CVE-2025-26530 describes a reflected XSS vulnerability in Moodle's question bank filter. The filter lacked adequate input sanitization, which could allow an attacker to inject and reflect malicious scripts in responses. This vulnerability affects Moodle versions 4.3.0 through 4.3.9, 4.4.0 through 4.4.5, and 4.5.0 through 4.5.1. The issue has been resolved in later versions, with patches available as referenced in the Moodle git repository under commit MDL-84146.

References

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