CVE-2024-43433VulnerabilityPublished 11 Nov 2024Updated 12 Nov 2024

CVE-2024-43433: moodle · matrix user/power level management not always working as expected with suspended users

Affects moodleSource CVE Database V5

Not known to be exploited · CVSS 5.3 Medium · fixed in 4.4.2 : update moodle when convenient.

Data as of 26 Oct 2026, 08:30 UTC

CVSS 3.1 base score

5.3Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.4.2, 4.3.6, 4.2.9 +1

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
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: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
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: None: There is no loss of confidentiality within the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on 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 11 Nov 2024
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 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 4.4.2, 4.3.6, 4.2.9 or 4.1.12.

Affected software

Product	Affected	Fixed in
moodle	Affected <4.1.12 >=4.2 <4.2.9 >=4.3 <4.3.6 >=4.4 <4.4.2	Fixed in 4.4.2 4.3.6 4.2.9 4.1.12
GitHubmoodle`pkg:github/moodle`Other threats	Affected <4.1.12 >=4.2 <4.2.9 >=4.3 <4.3.6 >=4.4 <4.4.2	Fixed in 4.1.12 4.2.9 4.3.6 4.4.2

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-2024-43433, organizations should first monitor Moodle and Matrix integration configurations to identify suspended users who may still have active Matrix memberships or elevated power levels. Immediate steps include manually auditing and revoking Matrix room memberships and permissions for suspended users. Administrators should implement strict synchronization checks between Moodle user status and Matrix access controls, possibly using custom scripts or third-party tools to enforce correct privilege revocation. If you cannot patch yet, consider temporarily disabling Matrix integration or restricting Matrix room administrative privileges to trusted users only. Regularly update Moodle to the latest versions once patches addressing this vulnerability become available. Additionally, enhance monitoring and alerting for unusual Matrix room activities, such as unexpected changes in power levels or membership by suspended users. Educate administrators and users about the risk and encourage prompt reporting of suspicious behavior. Finally, review and tighten overall access control policies to minimize potential abuse from lingering permissions.

Description

A flaw was found in moodle. Matrix room membership and power levels are incorrectly applied and revoked for suspended Moodle users.

Impact

The primary impact of CVE-2024-43433 is on the integrity of access controls within organizations using Moodle integrated with Matrix communication rooms. Suspended users retaining membership and elevated power levels can misuse their privileges to manipulate chat room settings, moderate discussions, or access information they should no longer have. This can lead to unauthorized influence over communication channels, disruption of collaborative environments, and potential exposure of sensitive operational details shared within these rooms. Although confidentiality and availability are not directly compromised, the integrity breach can undermine trust in the platform and complicate administrative control. Educational institutions, corporate training environments, and any organizations relying on Moodle and Matrix for collaboration are at risk. The ease of remote exploitation without authentication increases the threat level, especially in environments with frequent user suspensions or disciplinary actions. The lack of known exploits in the wild currently limits immediate widespread impact, but the vulnerability remains a significant risk until patched or mitigated.

CWE-863Incorrect Authorization (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #17OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Architecture and Design
Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries.
Architecture and Design
Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 28 Feb 2026, 06:28 UTC

WeaknessesCWE-863

Technical details

References

Community reviews

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