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Vulnerabilities

Vulnerability · CVE-2026-31281

Totara LMS v19.1.5 and before is vulnerable to HTML Injection.

Published Apr 13, 2026 · catalog updated Jun 17, 2026 · Totara LMS v19.1.5 and

Check if you run it

No confirmed exploitation is on record for CVE-2026-31281. EPSS is 0.43%. Act only if a listed version of Totara LMS v19.1.5 and is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Totara LMS v19.1.5 and).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.43%
Remediation
Not established
Affected products
See sources for product scope

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 , , , , , , , , , , etc., and any attempt to embed tags or attributes outside of the allowed list (including onerror, onaction, etc.) is sanitized via DOMPurify.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-31281

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-31281. EPSS is 0.43%. Act only if a listed version of Totara LMS v19.1.5 and is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.43%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 13, 2026 · NIST NVD

    Detected

    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

  2. Jun 17, 2026 · NIST NVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2026-31281

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-31281

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-31281

    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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.