How severe is CVE-2025-55209?

CVE-2025-55209 has a CVSS 4.0 base score of 5.1, rated medium severity.

Is CVE-2025-55209 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-55209?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-55209 have an EU (EUVD) identifier?

Yes. CVE-2025-55209 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26874.

When was CVE-2025-55209 published?

CVE-2025-55209 was published on 2025-09-04 and last updated on 2026-06-17.

CVE-2025-55209

CVE-2025-55209 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.1. 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: Medium (CVSS 4.0 base score 5.1)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-26874
Weakness: CWE-79
Published: 2025-09-04
Last modified: 2026-06-17

Description

contactmanager is a module for FreePBX@, which is an open source GUI that controls and manages Asterisk© (PBX). In versions 15.0.14 and below, 16.0.0 through 16.0.26.4 and 17.0.0 through 17.0.5, a stored cross-site scripting (XSS) vulnerability in FreePBX allows a low-privileged User Control Panel (UCP) user to inject malicious JavaScript into the system. The malicious code executes in the context of an administrator when they interact with the affected component, leading to session hijacking and potential privilege escalation. This issue is fixed in versions 15.0.14, 16.0.27 and 17.0.6.

Frequently asked questions

What is CVE-2025-55209?: contactmanager is a module for FreePBX@, which is an open source GUI that controls and manages Asterisk© (PBX). In versions 15.0.14 and below, 16.0.0 through 16.0.26.4 and 17.0.0 through 17.0.5, a stored cross-site scripting (XSS) vulnerability in FreePBX allows a low-privileged User Control Panel (UCP) user to inject malicious JavaScript into the system. The malicious code executes in the context of an administrator when they interact with the affected component, leading to session hijacking and potential privilege escalation. This issue is fixed in versions 15.0.14, 16.0.27 and 17.0.6.
How severe is CVE-2025-55209?: CVE-2025-55209 has a CVSS 4.0 base score of 5.1, rated medium severity.
Is CVE-2025-55209 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-55209?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-55209 have an EU (EUVD) identifier?: Yes. CVE-2025-55209 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26874.
When was CVE-2025-55209 published?: CVE-2025-55209 was published on 2025-09-04 and last updated on 2026-06-17.

References

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