How severe is CVE-2011-4625?

CVE-2011-4625 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2011-4625?

CVE-2011-4625 affects the following packages: simplesamlphp/simplesamlphp (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2011-4625?

Update simplesamlphp/simplesamlphp to 1.8.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-4625 is resolved across your whole dependency graph.

How do I detect CVE-2011-4625 in my Packagist dependencies?

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.

How do I mitigate CVE-2011-4625 if there is no patch (or I can't update yet)?

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.

Is CVE-2011-4625 actively exploited in the wild?

No public exploit code has been indexed for CVE-2011-4625 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2011-4625?

CVE-2011-4625 has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 55th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2011-4625?

CVE-2011-4625 is classified as CWE-755 (CWE-755). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2011-4625 published, and has it been updated?

CVE-2011-4625 was published on November 6, 2019 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘

🐘 Packagist

Not in CISA KEV

HIGH severity

CVE-2011-4625 — simplesamlphp

HIGH

CVE-2011-4625 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.

simpleSAMLphp incorrectly handles XML encryption

Also known asGHSA-5fj7-f8x3-q2mc

Published

Nov 6, 2019

Updated

Apr 10, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 31, 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

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

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`simplesamlphp/simplesamlphp`	all versions	1.8.1`composer require simplesamlphp/simplesamlphp:^1.8.1`

Affected Products

2 products · 5 configurations

debian linuxdebian

3 versions

8.09.010.0

Application

simplesamlphpsimplesamlphp

≥ 1.8.0 && < 1.8.2

range

Detection & mitigation playbook

Open-source dependency

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.
Fix
Update simplesamlphp/simplesamlphp to 1.8.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-4625 is resolved across your whole dependency graph.
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

Is CVE-2011-4625 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

7.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Raw vector

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

CWE Classification

CWE-755CWE-755

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

simplesamlphp

5.6/10

Maintained10/10

Code-Review4/10

Branch-ProtectionN/A

Assessed Oct 19, 2026

Timeline

Disclosed

Nov 6, 2019

Last updated

Apr 10, 2026

Identifiers

CVE-2011-4625

GHSA-5fj7-f8x3-q2mc

References

Advisorysecurity-tracker.debian.org · CVE 2011 4625 Advisorymageni.net · 1.3.6.1.4.1.25623.1.0.70545 Advisorynvd.nist.gov · CVE 2011 4625 Webgithub.com · simplesamlphp changelog 1.x.md Websecure1.securityspace.com · catid Webmageni.net · debian security advisory dsa 2330 1 simplesamlphp 70545 Packagegithub.com · simplesamlphp

Related vulnerabilities

This CVE is high severity; 1 of 8 other CVEs affecting simplesamlphp/simplesamlphp is rated as high or higher (top: high).

CVE-2026-49284GHSA-7wh8-jrq7-p27fGHSA-ppm4-r2vc-pg74GHSA-v858-922f-fj9vGHSA-vpr3-cw3h-prw8CVE-2017-12870CVE-2017-12871CVE-2018-6520

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedApr 10, 2026

CVE-2011-4625 — simplesamlphp

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2011-4625 in your dependencies?