How severe is CVE-2025-54299?

CVE-2025-54299 has a CVSS 4.0 base score of 9.4, rated critical severity.

Is CVE-2025-54299 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-54299?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-54299 have an EU (EUVD) identifier?

Yes. CVE-2025-54299 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22930.

When was CVE-2025-54299 published?

CVE-2025-54299 was published on 2025-07-28 and last updated on 2026-06-17.

CVE-2025-54299

CVE-2025-54299 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Critical (CVSS 4.0 base score 9.4)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22930
Weakness: CWE-79
Published: 2025-07-28
Last modified: 2026-06-17

Description

A stored XSS vulnerability in No Boss Testimonials component 1.0.0-3.0.0 and 4.0.0-4.0.2 for Joomla was discovered.

Frequently asked questions

What is CVE-2025-54299?: A stored XSS vulnerability in No Boss Testimonials component 1.0.0-3.0.0 and 4.0.0-4.0.2 for Joomla was discovered.
How severe is CVE-2025-54299?: CVE-2025-54299 has a CVSS 4.0 base score of 9.4, rated critical severity.
Is CVE-2025-54299 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-54299?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-54299 have an EU (EUVD) identifier?: Yes. CVE-2025-54299 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22930.
When was CVE-2025-54299 published?: CVE-2025-54299 was published on 2025-07-28 and last updated on 2026-06-17.

References

https://nobossextensions.com/

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