How severe is CVE-2025-63589?

CVE-2025-63589 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-2025-63589 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.

What products are affected by CVE-2025-63589?

CVE-2025-63589 affects Cmsimple-xh Cmsimple Xh. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63589?

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-2025-63589 have an EU (EUVD) identifier?

Yes. CVE-2025-63589 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38066.

When was CVE-2025-63589 published?

CVE-2025-63589 was published on 2025-11-06 and last updated on 2026-06-17.

CVE-2025-63589

CVE-2025-63589 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% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-38066
Weakness: CWE-79
Affected product: Cmsimple-xh Cmsimple Xh
Published: 2025-11-06
Last modified: 2026-06-17

Description

A reflected XSS vulnerability exists in CMSimple_XH 1.8's index.php router when attacker-controlled path segments are not sanitized or encoded before being inserted into the generated HTML (navigation links, breadcrumbs, search form action, footer links). An attacker-controlled string placed in the URL path is reflected into multiple HTML elements, allowing execution of arbitrary JavaScript in victims' browsers visiting a crafted URL.

Frequently asked questions

What is CVE-2025-63589?: A reflected XSS vulnerability exists in CMSimple_XH 1.8's index.php router when attacker-controlled path segments are not sanitized or encoded before being inserted into the generated HTML (navigation links, breadcrumbs, search form action, footer links). An attacker-controlled string placed in the URL path is reflected into multiple HTML elements, allowing execution of arbitrary JavaScript in victims' browsers visiting a crafted URL.
How severe is CVE-2025-63589?: CVE-2025-63589 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-2025-63589 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.
What products are affected by CVE-2025-63589?: CVE-2025-63589 affects Cmsimple-xh Cmsimple Xh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63589?: 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-2025-63589 have an EU (EUVD) identifier?: Yes. CVE-2025-63589 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38066.
When was CVE-2025-63589 published?: CVE-2025-63589 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:-:*:*:*:*:*:*

More vulnerabilities in Cmsimple-xh Cmsimple Xh

CVE-2021-42645 — Critical (CVSS 10.0): CMSimple_XH 1.7.4 is affected by a remote code execution (RCE) vulnerability. To exploit this vulnerability, an…
CVE-2021-47736 — High (CVSS 7.2): CMSimple_XH 1.7.4 contains an authenticated remote code execution vulnerability in the content editing functionality…
CVE-2025-63588 — High (CVSS 7.1): An unauthenticated reflected cross-site scripting vulnerability in the query handling of CMSimpleXH allows remote…
CVE-2024-34452 — Medium (CVSS 6.1): CMSimple_XH 1.7.6 allows XSS by uploading a crafted SVG document.

All CVEs affecting Cmsimple-xh Cmsimple Xh →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →