FKIE_CVE-2026-77998

Vulnerability from fkie_nvd - Published: 2026-08-25 13:19 - Updated: 2026-08-26 23:17
Severity
10.0 (Critical) - 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
Summary
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.
References
security@joomla.orghttps://www.miniorange.com/
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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 \u2013 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"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "OAuth Single Sign-On \u2013 OIDC SSO | Login with Azure AD",
          "vendor": "miniorange.com",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0-1.2.1"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Login with Keycloak OAuth Single Sign-On (SSO)",
          "vendor": "miniorange.com",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0-1.2.1"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Single Sign-On for Educational Institutes - version",
          "vendor": "miniorange.com",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0-1.2.1"
            }
          ]
        }
      ],
      "source": "security@joomla.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Joomla Extension - miniorange.com - Unauthenticated Authentication Bypass via SAMLResponse Parameter in miniOrange SAML SSO \u003c 11.0.2, SAML SP Single Sign On \u2013 Login with ADFS \u003c 6.4,  SAML SP Single Sign On \u2013 SAML SSO login with Google Apps \u003c 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\u0027s 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 \u2014 bypassing verification entirely and resulting in wp_set_auth_cookie() being called for the targeted account."
    }
  ],
  "id": "CVE-2026-77998",
  "lastModified": "2026-08-26T23:17:20.200",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 10.0,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "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/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security@joomla.org",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-77998",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-25T14:38:55.305998Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-25T13:19:30.817",
  "references": [
    {
      "source": "security@joomla.org",
      "url": "https://www.miniorange.com/"
    }
  ],
  "sourceIdentifier": "security@joomla.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "security@joomla.org",
      "type": "Secondary"
    }
  ]
}



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