Is CVE-2025-65954 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-65954 being exploited in the wild.

How severe is CVE-2025-65954?

Medium severity, with a CVSS score of 4.7, published 18 May 2026.

Which products and versions are affected?

simplesamlphp/simplesamlphp-module-casserver (Packagist) ECOSYSTEM:introduced=7.0.0-rc1,fixed=7.0.0; Simplesamlphp-Module-Casserver < 6.3.1, < 7.0.0.

Is there a fix for CVE-2025-65954?

Yes. simplesamlphp/simplesamlphp-module-casserver (Packagist): upgrade to 7.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2025-65954 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2025-65954?

Check whether you run simplesamlphp/simplesamlphp-module-casserver (Packagist), Simplesamlphp CAS Server Module or Simplesamlphp-Module-Casserver at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2025-65954: SimpleSAMLphp-casserver open redirect in logout endpoint

Q: Is there a fix for CVE-2025-65954?

Yes. simplesamlphp/simplesamlphp-module-casserver (Packagist): upgrade to 7.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2025-65954 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2025-65954?

Check whether you run simplesamlphp/simplesamlphp-module-casserver (Packagist), Simplesamlphp CAS Server Module or Simplesamlphp-Module-Casserver at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2025-65954 · Severity: medium · CVSS 4.7 · Published 2026-05-18

A vulnerability in the SimpleSAMLphp CAS server module allows attackers to redirect users to malicious websites. This occurs during the logout process when the system incorrectly trusts a web address provided in the logout request. Attackers can use this to create convincing phishing links that appear to come from a trusted corporate login portal, potentially leading to credential theft or further social engineering attacks.

Vendors: Packagist, Simplesamlphp.

Quick answers

Is CVE-2025-65954 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2025-65954 being exploited in the wild.
How severe is CVE-2025-65954?: Medium severity, with a CVSS score of 4.7, published 18 May 2026.
Which products and versions are affected?: simplesamlphp/simplesamlphp-module-casserver (Packagist) ECOSYSTEM:introduced=7.0.0-rc1,fixed=7.0.0; Simplesamlphp-Module-Casserver < 6.3.1, < 7.0.0.
Is there a fix for CVE-2025-65954?: Yes. simplesamlphp/simplesamlphp-module-casserver (Packagist): upgrade to 7.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-65954 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2025-65954?: Check whether you run simplesamlphp/simplesamlphp-module-casserver (Packagist), Simplesamlphp CAS Server Module or Simplesamlphp-Module-Casserver at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

simplesamlphp/simplesamlphp-module-casserver (Packagist): upgrade to 7.0.0 or later
```
composer require simplesamlphp/simplesamlphp-module-casserver:^7.0.0
```

Technical details

An open redirect vulnerability (CWE-601) exists in the LogoutController of the SimpleSAMLphp casserver module. The logout endpoint accepts a 'url' query parameter and fails to validate it against a list of trusted service URLs before performing a redirection. This can be exploited by a remote attacker who crafts a malicious link; when a user clicks the link, they are redirected to an arbitrary external site. The impact is highest when 'enable_logout' and 'skip_logout_page' are both set to true in the module configuration. The issue is fixed in versions 6.3.1 and 7.0.0.

Affected products

SimpleSAMLphp simplesamlphp-module-casserver >= 7.0.0-rc1, < 7.0.0-rc3; < 6.3.1

Identifiers

CVE-2025-65954
GHSA-cvrm-5hp6-h523

Timeline

2025-05-14: disclosed
2026-05-15: advisory: GitHub Advisory published

References

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