CVE-2020-12676
CRITICALFusionAuth fusionauth-samlv2 <0.2.3 - Auth Bypass
Title source: llmDescription
FusionAuth fusionauth-samlv2 0.2.3 allows remote attackers to forge messages and bypass authentication via a SAML assertion that lacks a Signature element, aka a "Signature exclusion attack".
References (5)
Core 5
Core References
Exploit, Third Party Advisory x_refsource_misc
https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdf
Third Party Advisory x_refsource_misc
https://github.com/SAMLRaider/SAMLRaider
Exploit, Mailing List, Third Party Advisory mailing-list
x_refsource_fulldisc
http://seclists.org/fulldisclosure/2020/Oct/1
Exploit, Mailing List, Vendor Advisory x_refsource_misc
https://compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txt
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.html
Scores
CVSS v3
9.1
EPSS
0.0287
EPSS Percentile
85.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Details
CWE
CWE-347
Status
published
Products (1)
fusionauth/samlv2
0.2.3
Published
Oct 02, 2020
Tracked Since
Feb 18, 2026