{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-31281", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-04-24T16:34:23.641Z", "dateReserved": "2026-03-09T00:00:00.000Z", "datePublished": "2026-04-13T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-04-24T16:34:23.641Z"}, "descriptions": [{"lang": "en", "value": "Totara LMS v19.1.5 and before is vulnerable to HTML Injection. An attacker can inject malicious HTML code in a message and send it to all the users in the application, resulting in executing the code and may lead to session hijacking and executing commands on the victim's browser. NOTE: The supplier states that the product name is Totara Learning and that the functionality referenced is the in app messaging client. They note that the in app messaging client only has the ability to embed a specific allowed list of HTML tags commonly used for text enhancement, which includes italic, bold, underline, strong, etc. Last, they state that the in app messaging client cannot embed <script>, <style>, <iframe>, <object>, <embed>, <form>, <input>, <button>, <svg>, <math>, etc., and any attempt to embed tags or attributes outside of the allowed list (including onerror, onaction, etc.) is sanitized via DOMPurify."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://www.totara.com/"}, {"url": "https://github.com/saykino/CVE-2026-31281"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}], "tags": ["disputed"]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-79", "lang": "en", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-04-14T15:44:48.124739Z", "id": "CVE-2026-31281", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-14T16:32:49.455Z"}}]}, "dataVersion": "5.2"}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,19.1.5]"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "lms", "vendor": "totara"}], "analysis": {"en": {"generated_at": "2026-04-14T20:12:25.478925+00:00", "value": {"mitigation_remediation": ["Check for and apply the latest Totara LMS update that addresses this issue; verify that release notes mention the removal of HTML injection in messages.", "If an update cannot be applied immediately, restrict or disable the ability for users to post raw HTML in the messaging feature, or enforce comprehensive sanitization on the message input.", "Review all custom themes and third\u2011party plugins for unchecked HTML handling and upgrade them to the newest secure versions.", "Monitor outbound messages for suspicious script tags and consider temporarily suspending public messaging until the flaw is resolved.", "Contact Totara support or consult their advisory channels to stay informed about patch availability and additional mitigation guidance."], "summary": {"action": "Immediate Update", "impact": "Cross\u2011Site Scripting allowing session hijacking and client\u2011side command execution"}, "threat_synthesis": {"affected_systems": "All installations of Totara LMS running version 19.1.5 or older are susceptible, regardless of deployment environment, as the flaw resides in the core messaging module shared across all sites.", "description_and_impact": "Totara LMS versions 19.1.5 and earlier allow the injection of arbitrary HTML through user messages. This flaw enables malicious scripts to run in the browsers of any user who receives the crafted message, potentially allowing an attacker to hijack sessions and execute commands on the victim\u2019s machine. The weakness is fundamentally a Cross\u2011Site Scripting vulnerability.", "risk_and_exploitability": "The CVSS score of 8.0 reflects a high impact, although the EPSS probability is below 1\u202f% and the vulnerability is not listed in CISA\u2019s KEV catalogue. Inferred from the description, the likely attack vector requires an authenticated user with permission to post messages, who can embed malicious HTML and broadcast it to all users. Once the victim views the message, the injected script executes in their browser, enabling session hijacking and other client\u2011side exploits."}}}}, "created": "2026-04-14T16:22:09.849783+00:00", "updated": "2026-04-15T15:45:07.541640+00:00", "vendors": ["totara", "totara$PRODUCT$lms"]}