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Not in CISA KEV
HIGH severity

simpleSAMLphp incorrectly handles XML encryptionGHSA-5fj7-f8x3-q2mc

HIGH

GHSA-5fj7-f8x3-q2mc is a high-severity (CVSS 7.5) CWE-755 vulnerability in simplesamlphp/simplesamlphp. A fix is available for simplesamlphp/simplesamlphp — see the affected versions and patch details below.

Also known asCVE-2011-4625
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs55th percentile — riskier than 55% of all scored CVEsHighest risk
0.00%0.41%0.83%1.24%0.3%0.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘simplesamlphp/simplesamlphp

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

simplesamlphp before 1.6.3 (squeeze) and before 1.8.2 (sid) incorrectly handles XML encryption which could allow remote attackers to decrypt or forge messages.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistsimplesamlphp/simplesamlphpall versions1.8.1composer require simplesamlphp/simplesamlphp:^1.8.1

Affected Products

2 products · 5 configurations
OS
debian linuxdebian
3 versions
8.09.010.0
Application
simplesamlphpsimplesamlphp
≥ 1.8.0 && < 1.8.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for simplesamlphp/simplesamlphp, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update simplesamlphp/simplesamlphp to 1.8.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-5fj7-f8x3-q2mc is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

simplesamlphp before 1.6.3 (squeeze) and before 1.8.2 (sid) incorrectly handles XML encryption which could allow remote attackers to decrypt or forge messages.
O3 Security · Impact-Aware SCA

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simpleSAMLphp incorrectly handles XML encryption