VulnerabilityPublished 4 Feb 2026Updated 26 Feb 2026

CVE-2025-67849: moodle · Cross-site Scripting

Affects moodleSource CVE Database V5

Not known to be exploited · CVSS 7.3 High · fixed in 5.1.1 : patch moodle soon.

Data as of 26 Oct 2026, 09:15 UTC

CVSS 3.1 base score

7.3High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 5.1.1, 5.0.4, 4.5.8

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Feb 2026
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 5.1.1, 5.0.4 or 4.5.8.

Affected software

Product	Affected	Fixed in
Packagistmoodle/moodle`pkg:composer/moodle/moodle`Other threats	Affected =4.5.0 =5.0.0 =5.1.0	Fixed in–
GitHubmoodle`pkg:github/moodle`Other threats	Affected >=4.5.0 <4.5.8 >=5.0.0 <5.0.4 >=5.1.0 <5.1.1	Fixed in 4.5.8 5.0.4 5.1.1

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

AI-suggested

To mitigate CVE-2025-67849, organizations should immediately upgrade Moodle to patched versions once available. In the absence of patches, administrators should implement strict input validation and output encoding on all AI prompt responses before rendering them in web pages. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. Limit user privileges to the minimum necessary to reduce the risk of malicious input submission. Monitor logs for unusual activities related to AI prompt inputs and user session anomalies. Educate users about the risks of interacting with suspicious content and encourage the use of multi-factor authentication to protect accounts from hijacking. Additionally, consider disabling or restricting AI prompt features temporarily if they cannot be secured promptly. Regular security assessments and penetration testing focused on AI integration points can help identify and remediate similar vulnerabilities proactively.

Description

A flaw was found in Moodle. This cross-site scripting (XSS) vulnerability, caused by improper sanitization of AI prompt responses, allows attackers to inject malicious HTML or script into web pages. When other users view these compromised pages, their sessions could be stolen, or the user interface could be manipulated.

Impact

The primary impact of CVE-2025-67849 is on the confidentiality and integrity of Moodle users' data. Successful exploitation can lead to session hijacking, allowing attackers to impersonate legitimate users and access sensitive educational content, personal information, or administrative functions. Manipulation of the user interface can facilitate phishing attacks or unauthorized actions within the platform. For educational institutions and organizations relying on Moodle for e-learning, this can result in data breaches, loss of trust, and disruption of learning activities. While availability is not directly affected, the indirect consequences of compromised accounts and manipulated interfaces can degrade service quality and user confidence. The vulnerability's exploitation could also serve as a foothold for further attacks within the affected networks. Given Moodle's widespread use globally, the impact can be significant if not addressed promptly.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Feb 2026, 07:37 UTC

Technical details

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