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CVE-2025-54299CriticalCVSS 9.4CVE published 28 July 2025

No Boss Testimonials (com_nobosstestimonials) <= 4.0.2 - Stored XSS

No Boss Testimonials (versions 1.0.0-3.0.0 and 4.0.0-4.0.2) is affected by a stored XSS vulnerability (CVE-2025-54299). Treat any install at or below 4.0.2 as vulnerable.

Is my site affected?

Affected
No Boss Testimonials up to and including 4.0.2
Fixed in
A release after 4.0.2
What to do
Update No Boss Testimonials to the newest release from the vendor. This flaw covers versions up to 4.0.2, so any later release is outside it.
Check whether your sites are affected

How CVE-2025-54299 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.

9.4 Critical

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

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:N Privileges required
None. No account needed
UI:P User interaction
Passive. Someone has to visit a page

What it does to the site

VC:H Confidentiality
High. Everything the site holds can be read
VI:H Integrity
High. Data and files can be altered at will
VA:N Availability
None. The site stays up

What it does beyond the site

SC:H Confidentiality
High. Data on other systems can be read
SI:H Integrity
High. Other systems can be altered
SA:H Availability
High. Other systems can be taken down

Timeline

  1. 28 July 2025CVE-2025-54299 record published by its CNA

Rule details

References

CVE-2025-54299 questions

Which versions are affected by CVE-2025-54299?
CVE-2025-54299 affects No Boss Testimonials up to and including 4.0.2.
How do I fix CVE-2025-54299?
Update No Boss Testimonials to the newest release from the vendor. This flaw covers versions up to 4.0.2, so any later release is outside it.
How severe is CVE-2025-54299?
Joomla CNA scores it 9.4 (Critical) under CVSS 4.0. In plain terms: reachable across the internet, no account needed and someone has to visit a page.

Running an affected version on a site you manage?

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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 25 October 2026.