Skip to main content
mySites.guru
Free Audit
J!Awards 2026mySites.guru is shortlisted for Your Favourite Tool in Your Joomla WorkflowVote by 11 OctoberHow to vote
CVE-2025-50126MediumCVSS 5.3CVE published 18 July 2025Added to mySites.guru 1 January 2025

RSBlog! (com_rsblog) 1.11.6 to 1.14.5 - CVE-2025-50126 Stored XSS

RSBlog! by RSJoomla! versions 1.11.6 to 1.14.5 contain a stored XSS vulnerability (CVE-2025-50126): an authenticated user can inject arbitrary HTML/JavaScript via the jform[tags_text] parameter, which is executed when other users view the affected content. Update RSBlog! to 1.14.6 or later. Also covered by this rule: CVE-2025-27754, a stored XSS in RSBlog! 1.11.6 to 1.14.4 that lets an authenticated user inject JavaScript which is executed when other users view the affected content.

Is my site affected?

Affected
RSBlog! from 1.11.6 up to but not including 1.14.6
Fixed in
1.14.6
What to do
Update RSBlog! to 1.14.6 or later.
Check whether your sites are affected

How CVE-2025-50126 is scored

The base metrics as Joomla CNA published them, and what each one means for a site running an affected version. Threat and environmental metrics are left out: they describe a moment or a particular install rather than the flaw.

5.3 Medium

CVSS 4.0, scored by Joomla CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

How it is reached

AV:N Attack vector
Network. Reachable across the internet
AC:L Attack complexity
Low. Nothing to work around, it just works
AT:N Attack requirements
None. Works against any affected install
PR:L Privileges required
Low. Any logged-in account will do
UI:N User interaction
None. Nobody has to be tricked into anything

What it does to the site

VC:L Confidentiality
Low. Some data can be read
VI:L Integrity
Low. Some data can be altered
VA:N Availability
None. The site stays up

What it does beyond the site

SC:N Confidentiality
None. Other systems keep their data
SI:N Integrity
None. Other systems keep their integrity
SA:N Availability
None. Other systems stay up

Timeline

  1. 1 January 2025mySites.guru check added for RSBlog! (from 1.11.6 up to but not including 1.14.6)
  2. 18 July 2025CVE-2025-50126 record published by its CNA

Rule details

Other vulnerabilities in RSBlog!

Updating for CVE-2025-50126 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension.

RSBlog!

Latest safe version: 1.14.6

References

CVE-2025-50126 questions

Which versions are affected by CVE-2025-50126?
CVE-2025-50126 affects RSBlog! from 1.11.6 up to but not including 1.14.6. The fix is in 1.14.6.
How do I fix CVE-2025-50126?
Update RSBlog! to 1.14.6 or later. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
How severe is CVE-2025-50126?
Joomla CNA scores it 5.3 (Medium) under CVSS 4.0. In plain terms: reachable across the internet, any logged-in account will do and nobody has to be tricked into anything.

Running an affected version on a site you manage?

A free audit tells you which of your Joomla and WordPress sites run an affected version, which are out of date, and which have not been backed up. No card required. If a site is already compromised, fix.mysites.guru is a single fixed fee per incident, usually resolved the same day.

This check is part of the mySites.guru Joomla vulnerability scanner, which reads every installed extension's version on each audit. Browse the rest of the Joomla vulnerability database.

Rules current as of 5 October 2026.