Medium severity · published Jul 1, 2026
CVE-2026-13443
Tutor LMS <= 3.9.13 - Authenticated (Author+) Stored Cross-Site Scripting via Lesson Attachment Title
6.4
CVSS
0.4%
EPSS
No
On KEV
Description
The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Lesson Attachment Title in all versions up to, and including, 3.9.13 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TL
Tutor LMS – eLearning and online course solution · themeum
through 3.9.13 · source: vendor
Affected product
TL
Tutor LMS – eLearning and online course solution
themeum
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-13443
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-13443
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/classes/Utils.php#L1688
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/classes/Utils.php#L1720
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/templates/global/attachments.php#L34
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/classes/Utils.php#L1688
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/classes/Utils.php#L1720
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/templates/global/attachments.php#L34
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