CVE-2024-3931VulnerabilityPublished 18 Apr 2024Updated 10 Jun 2025

CVE-2024-3931: Totara LMS · Cross Site Scripting

Affects Totara LMSSource CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 4.0 base score

5.1Medium

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

EPSS: 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

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

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, 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: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system 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 to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Apr 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 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

Affected software

Product	Affected	Fixed in
Totara LMS	Affected =13.0 =13.1 =13.2 =13.3 =13.4 =13.5 =13.6 =13.7 =13.8 =13.9 =13.10 =13.11 =13.12 =13.13 =13.14 =13.15 =13.16 =13.17 =13.18 =13.19 =13.20 =13.21 =13.22 =13.23 =13.24 =13.25 =13.26 =13.27 =13.28 =13.29 =13.30 =13.31 =13.32 =13.33 =13.34 =13.35 =13.36 =13.37 =13.38 =13.39 =13.40 =13.41 =13.42 =13.43 =13.44 =13.45 =14.0 =14.1 =14.2 =14.3 =14.4 =14.5 =14.6 =14.7 =14.8 =14.9 =14.10 =14.11 =14.12 =14.13 =14.14 =14.15 =14.16 =14.17 =14.18 =14.19 =14.20 =14.21 =14.22 =14.23 =14.24 =14.25 =14.26 =14.27 =14.28 =14.29 =14.30 =14.31 =14.32 =14.33 =14.34 =14.35 =14.36 =14.37 =15.0 =15.1 =15.2 =15.3 =15.4 =15.5 =15.6 =15.7 =15.8 =15.9 =15.10 =15.11 =15.12 =15.13 =15.14 =15.15 =15.16 =15.17 =15.18 =15.19 =15.20 =15.21 =15.22 =15.23 =15.24 =15.25 =15.26 =15.27 =15.28 =15.29 =15.30 =15.31 =15.32 =16.0 =16.1 =16.2 =16.3 =16.4 =16.5 =16.6 =16.7 =16.8 =16.9 =16.10 =16.11 =16.12 =16.13 =16.14 =16.15 =16.16 =16.17 =16.18 =16.19 =16.20 =16.21 =16.22 =16.23 =16.24 =16.25 =16.26 =17.0 =17.1 =17.2 =17.3 =17.4 =17.5 =17.6 =17.7 =17.8 =17.9 =17.10 =17.11 =17.12 =17.13 =17.14 =17.15 =17.16 =17.17 =17.18 =17.19 =17.20 =18.0 =18.1 =18.2 =18.3 =18.4 =18.5 =18.6 =18.7	Fixed in–

AI-suggested

Beyond the generic advice of upgrading to patched versions, European organizations should implement a multi-layered defense strategy. First, immediately apply the recommended Totara LMS updates to versions 13.46, 14.38, 15.33, 16.27, 17.21, or 18.8 to remediate the vulnerability. Second, conduct a thorough review of user input handling and ensure robust input validation and output encoding are enforced throughout the LMS, particularly in custom plugins or integrations. Third, deploy web application firewalls (WAFs) with rules tuned to detect and block XSS attack patterns targeting the affected endpoints. Fourth, implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing the LMS. Fifth, educate LMS users about phishing and suspicious links to reduce the risk of social engineering that could trigger XSS payloads. Finally, monitor LMS logs and network traffic for unusual activities indicative of exploitation attempts, and have an incident response plan ready to contain and remediate any breaches.

Description

A vulnerability was found in Totara LMS up to 18.7. It has been rated as problematic. Affected by this issue is some unknown functionality of the file admin/roles/check.php of the component User Selector. The manipulation of the argument ID Number leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 13.46, 14.38, 15.33, 16.27, 17.21 and 18.8 is able to address this issue. It is recommended to upgrade the affected component.

Impact

For European organizations, the impact of this vulnerability can be significant, especially for educational institutions, corporate training departments, and government agencies that rely on Totara LMS for e-learning and training. Successful exploitation could allow attackers to execute arbitrary scripts in the context of authenticated users, potentially leading to theft of session cookies, unauthorized actions on behalf of users, or delivery of malware. This could compromise sensitive personal data, intellectual property, and organizational credentials. Given the remote exploitability and lack of required privileges, attackers could target a broad range of users, increasing the risk of widespread compromise. The medium severity rating suggests moderate risk, but the potential for lateral movement or further exploitation in a networked environment could amplify the consequences. Disruption of LMS services or loss of trust in e-learning platforms could also indirectly affect organizational operations and reputation.

References

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