{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77998","assignerOrgId":"6ff30186-7fb7-4ad9-be33-533e7b05e586","state":"PUBLISHED","assignerShortName":"Joomla","dateReserved":"2026-08-21T19:23:55.924Z","datePublished":"2026-08-25T12:50:46.506Z","dateUpdated":"2026-09-08T10:38:41.779Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"SAML SSO Free for Joomla extension for Joomla","vendor":"miniorange.com","versions":[{"status":"affected","version":"1.0.0-11.0.1"}]},{"defaultStatus":"unaffected","product":"SAML SSO Basic for Joomla extension for Joomla","vendor":"miniorange.com","versions":[{"status":"affected","version":"1.0.0-13.1.0"}]},{"defaultStatus":"unaffected","product":"SAML SSO Standard for Joomla extension for Joomla","vendor":"miniorange.com","versions":[{"status":"affected","version":"1.0.0-24.1.0"}]},{"defaultStatus":"unaffected","product":"SAML SSO Premium for Joomla extension for Joomla","vendor":"miniorange.com","versions":[{"status":"affected","version":"1.0.0-34.1.0"}]},{"defaultStatus":"unaffected","product":"SAML SSO Enterprise for Joomla extension for Joomla","vendor":"miniorange.com","versions":[{"status":"affected","version":"1.0.0-44.1.0"}]},{"defaultStatus":"unaffected","product":"SAML SP Single Sign On – Login with ADFS extension for Joomla","vendor":"miniorange.com","versions":[{"status":"affected","version":"1.0.0-6.3.0"}]},{"defaultStatus":"unaffected","product":"SAML SSO login with Google Apps extension for Joomla","vendor":"miniorange.com","versions":[{"status":"affected","version":"1.0.0-6.3.0"}]}],"credits":[{"lang":"en","type":"finder","value":"Supakiad S. (m3ez)"},{"lang":"en","type":"finder","value":"Phil Taylor, mysites.guru"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"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."}],"value":"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."}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":10,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"6ff30186-7fb7-4ad9-be33-533e7b05e586","shortName":"Joomla","dateUpdated":"2026-09-08T10:38:41.779Z"},"references":[{"tags":["product"],"url":"https://www.miniorange.com/"}],"source":{"discovery":"UNKNOWN"},"title":"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","x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-77998","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-08-25T14:38:55.305998Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-25T14:51:54.057Z"}}]}}