CVE-2020-27847

Description

A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature Validation. This flaw allows an attacker to bypass SAML authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw affects dex versions before 2.27.0.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.76% Top 30%
Vendor Advisory mattermost.com
Affected: n/a dexidp/dex
Published at:
Updated at:

References

Link Tags
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1907732 third party advisory issue tracking
https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2020-27847?
CVE-2020-27847 has been scored as a critical severity vulnerability.
How to fix CVE-2020-27847?
To fix CVE-2020-27847, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-27847 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-27847 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-27847?
CVE-2020-27847 affects n/a dexidp/dex.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.