{"apiVersion":"1.0","identifier":"CVE-2026-77998","description":"Joomla Extension - miniorange.com - Unauthenticated Authentication Bypass via SAMLResponse Parameter in miniOrange SAML SSO < 11.0.2, SAML SP Single Sign On – Login with ADFS < 6.4, SAML SP Single Sign On – SAML SSO login with Google Apps < 6.4 - This is due to the mo_saml_validate_signature() function performing a loose boolean check on the raw tri-state integer returned by PHP-s openssl_verify(), causing an error return value of -1 to be evaluated as truthy and therefore treated as a successful signature verification. This makes it possible for unauthenticated attackers to log in as any existing Joomla user, including administrators, by submitting a crafted SAMLResponse containing an attacker-controlled NameID and a deliberately malformed signature value that triggers an OpenSSL processing error — bypassing verification entirely and resulting in wp_set_auth_cookie() being called for the targeted account.","publishedAt":"2026-08-25T13:19:30","lastModifiedAt":"2026-08-26T23:17:20","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77998","cvssScore":10,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","epssProbability":0.0034,"riskScore":1.03,"affectedProduct":"miniOrange SAML SSO","affectedVersions":"<11.0.2","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-77998","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-77998","en":"https://www.redsauce.net/en/cves/CVE-2026-77998","fr":"https://www.redsauce.net/fr/cves/CVE-2026-77998","pt":"https://www.redsauce.net/pt/cves/CVE-2026-77998","de":"https://www.redsauce.net/de/cves/CVE-2026-77998","sk":"https://www.redsauce.net/sk/cves/CVE-2026-77998","el":"https://www.redsauce.net/el/cves/CVE-2026-77998"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-77998"}}