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CVE-2019-3465

29
FAUCET Score

CVE-2019-3465 is a critical vulnerability in Rob Richards XmlSecLibs (versions prior to v3.0.3), including its use in SimpleSAMLphp, where improper cryptographic signature validation in XML messages allows authenticated attackers to impersonate users or escalate privileges. With a CVSS score of 8.8 (High), this network-exploitable flaw requires low privileges but can lead to high impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.0.0, <= 1.4.2CPE matchmatch criteria
cpe:2.3:a:xmlseclibs_project:xmlseclibs:*:*:*:*:*:*:*:*
>= 2.0.0, <= 2.1.0CPE matchmatch criteria
cpe:2.3:a:xmlseclibs_project:xmlseclibs:*:*:*:*:*:*:*:*
>= 3.0.0, <= 3.0.3CPE matchmatch criteria
cpe:2.3:a:xmlseclibs_project:xmlseclibs:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.02%
Probability of exploitation in next 30 days
EPSS Percentile
86.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0302 is in the 85th percentile among its peer group of 17,822 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

composerpatch availablevia ghsa
Product: robrichards/xmlseclibsFixed in: 3.0.4
composerpatch availablevia ghsa
Product: robrichards/xmlseclibsFixed in: 2.1.1
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-pqm6-cgwr-x6pfhigh

Signature validation bypass in XmlSecLibs

Nov 8, 2019

References

github.com / robrichards/xmlseclibs/commit/0a53d3c3aa87564910cae4ed01416441d3ae0db5
Patch
lists.debian.org / debian-lts-announce/2019/11/msg00003.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/7KID7C4AZPYYIZQIPSLANP4R2RQR6YK3
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/AB34ILMJ67CUROBOR6YPKB46VHXLOAJ4
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/BBKVDUZ7G5ZOUO4BFJWLNJ6VOKBQJX5U
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/BNFMY5RRLU63P25HEBVDO5KAVI7TX7JV
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ESKJTWLE7QZBQ3EKMYXKMBQG3JDEJWM6
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/HBE2SJSXG7J4XYLJ2H6HC2VPPOG2OMUN
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/MAWOVYLZKYDCQBLQEJCFAAD3KQTBPHXE
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/OCSR3V6LNWJAD37VQB6M2K7P4RQSCVFG
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/XBSSRV5Q7JFCYO46A3EN624UZ4KXFQ2M
seclists.org / bugtraq/2019/Nov/8
Issue TrackingMailing ListThird Party Advisory
simplesamlphp.org / security/201911-01
Third Party Advisory
debian.org / security/2019/dsa-4560
Third Party Advisory
tenable.com / security/tns-2019-09