How severe is CVE-2025-66686?

CVE-2025-66686 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-66686 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66686?

CVE-2025-66686 affects Grabaperch Perch. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66686?

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

Does CVE-2025-66686 have an EU (EUVD) identifier?

Yes. CVE-2025-66686 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1209.

When was CVE-2025-66686 published?

CVE-2025-66686 was published on 2026-01-07 and last updated on 2026-06-17.

CVE-2025-66686

CVE-2025-66686 is a medium-severity vulnerability in Grabaperch Perch with a CVSS 3.x base score of 6.1. 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 3.x base score 6.1)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1209
Weakness: CWE-79
Affected product: Grabaperch Perch
Published: 2026-01-07
Last modified: 2026-06-17

Description

A stored Cross-Site Scripting (XSS) vulnerability exists in Perch CMS version 3.2. An authenticated attacker with administrative privileges can inject malicious JavaScript code into the “Help button url” setting within the admin panel. The injected payload is stored and executed when any authenticated user clicks the Help button, potentially leading to session hijacking, information disclosure, privilege escalation, and unauthorized administrative actions.

Frequently asked questions

What is CVE-2025-66686?: A stored Cross-Site Scripting (XSS) vulnerability exists in Perch CMS version 3.2. An authenticated attacker with administrative privileges can inject malicious JavaScript code into the “Help button url” setting within the admin panel. The injected payload is stored and executed when any authenticated user clicks the Help button, potentially leading to session hijacking, information disclosure, privilege escalation, and unauthorized administrative actions.
How severe is CVE-2025-66686?: CVE-2025-66686 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-66686 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66686?: CVE-2025-66686 affects Grabaperch Perch. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66686?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66686 have an EU (EUVD) identifier?: Yes. CVE-2025-66686 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1209.
When was CVE-2025-66686 published?: CVE-2025-66686 was published on 2026-01-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:grabaperch:perch:3.2:*:*:*:*:*:*:*

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