Critical severity9.1NVD Advisory· Published Oct 2, 2020· Updated Jun 17, 2026
CVE-2020-12676
CVE-2020-12676
Description
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".
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- FusionAuth/fusionauth-samlv2description
- Range: <=0.2.3
Patches
Vulnerability mechanics
References
4- packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.htmlnvdExploitThird Party AdvisoryVDB Entry
- seclists.org/fulldisclosure/2020/Oct/1nvdExploitMailing ListThird Party Advisory
- compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txtnvdExploitMailing ListVendor Advisory
- www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdfnvdExploitThird Party Advisory
News mentions
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