How severe is CVE-2011-4625?

CVE-2011-4625 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2011-4625 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4625?

CVE-2011-4625 primarily affects Simplesamlphp. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4625?

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.

When was CVE-2011-4625 published?

CVE-2011-4625 was published on 2019-11-06 and last updated on 2026-06-16.

CVE-2011-4625

CVE-2011-4625 is a high-severity vulnerability in Simplesamlphp with a CVSS 3.x base score of 7.5. 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-755.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-755
Affected product: Simplesamlphp
Published: 2019-11-06
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2011-4625?: 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.
How severe is CVE-2011-4625?: CVE-2011-4625 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2011-4625 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4625?: CVE-2011-4625 primarily affects Simplesamlphp. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4625?: 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.
When was CVE-2011-4625 published?: CVE-2011-4625 was published on 2019-11-06 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

More vulnerabilities in Simplesamlphp

CVE-2018-6521 — Critical (CVSS 9.8): The sqlauth module in SimpleSAMLphp before 1.15.2 relies on the MySQL utf8 charset, which truncates queries upon…
CVE-2017-12873 — Critical (CVSS 9.8): SimpleSAMLphp 1.7.0 through 1.14.10 might allow attackers to obtain sensitive information, gain unauthorized access, or…
CVE-2017-12868 — Critical (CVSS 9.8): The secureCompare method in lib/SimpleSAML/Utils/Crypto.php in SimpleSAMLphp 1.14.13 and earlier, when used with PHP…
CVE-2016-9814 — Critical (CVSS 9.1): The validateSignature method in the SAML2\Utils class in SimpleSAMLphp before 1.14.10 and simplesamlphp/saml2 library…
CVE-2019-3465 — High (CVSS 8.8): Rob Richards XmlSecLibs, all versions prior to v3.0.3, as used for example by SimpleSAMLphp, performed incorrect…
CVE-2018-7711 — High (CVSS 8.1): HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the…

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Other CWE-755 (Improper Handling of Exceptional Conditions) vulnerabilities

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CVE-2021-42141 — Critical (CVSS 9.8): An issue was discovered in Contiki-NG tinyDTLS through 2018-08-30. One incorrect handshake could complete with…
CVE-2023-38406 — Critical (CVSS 9.8): bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow."
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