Is CVE-2025-65954 in the CISA KEV catalog?

No. CVE-2025-65954 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-65954?

CVE-2025-65954 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2025-65954?

CVE-2025-65954 has an EPSS score of 0.27% (19th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-65954?

Upgrade simplesamlphp-casserver to 6.3.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2025-65954

MEDIUM

6.1

CVSS v3

NVD

Description

SimpleSAMLphp-casserver is a CAS 1.0 and 2.0 compliant CAS server in the form of a SimpleSAMLphp module. In versions below 6.3.1 and 7.0.0, the logout endpoint accepts a url query parameter to redirect to. casserver treats that url as trusted, and either (depending on configuration) redirects the browser there, or shows a "you've been logged out" page with a link to continue to that url. Impacted configs include 'enable_logout' => true, and 'skip_logout_page' -> true. This issue has been resolved in versions 6.3.1 and 7.0.0.

CWE-601Open Redirect

How to fix

Remediation Available

simplesamlphp-casserverNVD

Affected:< 6.3.1Fixed in:6.3.1CVE-2025-65954derived from NVD

simplesamlphp-module-casserverNVD

Affected:< 6.3.1Fixed in:6.3.1CVE-2025-65954derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Intelligence

0.27%probability of exploitation in 30 days

19thpercentile

Low risk: more likely to be exploited than 19% of all known CVEs.

References

Patch2

Exploit1

github.com

Related Vulnerabilities

Other CWE-601 (Open Redirect) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-4123	High	7.6	98%	-	Fix
CVE-2018-11784	Medium	4.3	94%	-	Fix
CVE-2021-22881	Medium	6.1	87%	-	Fix
CVE-2022-45402	Medium	6.1	82%	-	Fix
CVE-2017-1000117	High	8.8	78%	-	Fix
CVE-2019-10098	Medium	6.1	74%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-27.