How severe is CVE-2025-63588?

CVE-2025-63588 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2025-63588 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-63588?

CVE-2025-63588 affects Cmsimple-xh Cmsimple Xh. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63588?

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

Does CVE-2025-63588 have an EU (EUVD) identifier?

Yes. CVE-2025-63588 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38063.

When was CVE-2025-63588 published?

CVE-2025-63588 was published on 2025-11-06 and last updated on 2026-06-17.

CVE-2025-63588

CVE-2025-63588 is a high-severity vulnerability in Cmsimple-xh Cmsimple Xh with a CVSS 3.x base score of 7.1. 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: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-38063
Weakness: CWE-79
Affected product: Cmsimple-xh Cmsimple Xh
Published: 2025-11-06
Last modified: 2026-06-17

Description

An unauthenticated reflected cross-site scripting vulnerability in the query handling of CMSimpleXH allows remote attackers to inject and execute arbitrary JavaScript in a victim's browser via a crafted request (e.g., a maliciously crafted POST login). Successful exploitation may lead to theft of session cookies, credential disclosure, or other client-side impacts.

Frequently asked questions

What is CVE-2025-63588?: An unauthenticated reflected cross-site scripting vulnerability in the query handling of CMSimpleXH allows remote attackers to inject and execute arbitrary JavaScript in a victim's browser via a crafted request (e.g., a maliciously crafted POST login). Successful exploitation may lead to theft of session cookies, credential disclosure, or other client-side impacts.
How severe is CVE-2025-63588?: CVE-2025-63588 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2025-63588 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-63588?: CVE-2025-63588 affects Cmsimple-xh Cmsimple Xh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63588?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-63588 have an EU (EUVD) identifier?: Yes. CVE-2025-63588 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38063.
When was CVE-2025-63588 published?: CVE-2025-63588 was published on 2025-11-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cmsimple-xh:cmsimple_xh:1.8.0:-:*:*:*:*:*:*

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