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TI-2026-36198 Aliases CVE-2026-48940GHSA-4gq9-7rp6-9749

Joomla Extension - getk2.org - Stored-XSS in K2 extension for Joomla < 2.26

Priority LOW 16CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

A Joomla user with K2 "create item" rights (Author tier by default) can submit an article whose `embedVideo` POST field contains a raw `<script>` tag; K2 stores it verbatim and renders it unescaped to any visitor of the article page.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00284 21st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
getk2.orgK2 extension for Joomla1.0-2.26—No fix listedCNA
  • K2 extension for Joomla Vendorgetk2.org Affected 1.0-2.26 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:joomlaworks:k2:*:*:*:*:*:joomla\!:*:*up to 2.26Vulnerablegetk2.org
  • cpe:2.3:a:joomlaworks:k2:*:*:*:*:*:joomla\!:*:* Versions up to 2.26 Vulnerable ·getk2.org

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-48940
  2. 2026-10-03 Alias added: GHSA-4gq9-7rp6-9749

References

Other 1

  • TI-2018-05393 The K2 component 2.8.0 for Joomla! has Incorrect Access Control with directory traversal… CVSS 3.0HIGH 7.5
  • TI-2019-14102 class.upload.php in verot.net class.upload before 1.0.3 and 2.x before 2.0.4, as used in… CVSS 3.1CRITICAL 9.8
  • TI-2019-14148 class.upload.php in verot.net class.upload through 1.0.3 and 2.x through 2.0.4, as used… CVSS 3.1CRITICAL 9.8
  • TI-2026-36201 Joomla Extension - getk2.org - Authenticated user property mass-assignment in K2 extension for Joomla < 2.26 CVSS 3.1MEDIUM 6.5
  • TI-2026-36199 Joomla Extension - getk2.org - Unauthenticated folder delete in K2 extension for Joomla < 2.26 CVSS 3.1MEDIUM 6.5
  • TI-2026-36204 Joomla Extension - getk2.org - Privileged RCE vulnerability in K2 extension for Joomla < 2.26 CVSS 3.1MEDIUM 6.3
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences