CVE-2026-48940
Joomla Extension - getk2.org - Stored-XSS in K2 extension for Joomla < 2.26
Description
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.
INFO
Published Date :
June 25, 2026, 4:16 p.m.
Last Modified :
June 28, 2026, 7:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | LOW | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update K2 to the latest version.
- Sanitize embedVideo POST field input.
- Review all user-supplied content fields.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-48940.
| URL | Resource |
|---|---|
| https://www.getk2.org/ | Product |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-48940 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-48940
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-48940 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-48940 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jun. 28, 2026
Action Type Old Value New Value Changed Affected [{'vendor': 'getk2.com', 'product': 'K2 extension for Joomla', 'versions': [{'status': 'affected', 'version': '1.0-2.26'}], 'defaultStatus': 'unaffected'}] [{'vendor': 'getk2.org', 'product': 'K2 extension for Joomla', 'versions': [{'status': 'affected', 'version': '1.0-2.26'}], 'defaultStatus': 'unaffected'}] -
Initial Analysis by [email protected]
Jun. 26, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:joomlaworks:k2:*:*:*:*:*:joomla!:*:* versions up to (including) 2.26 Added Reference Type Joomla! Project: https://www.getk2.org/ Types: Product -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 25, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N Added SSVC {'id': 'CVE-2026-48940', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-25T18:47:21.595982Z'} -
New CVE Received by [email protected]
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'getk2.com', 'product': 'K2 extension for Joomla', 'versions': [{'status': 'affected', 'version': '1.0-2.26'}], 'defaultStatus': 'unaffected'}] Added Description 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. Added CWE CWE-79 Added Reference https://www.getk2.org/