Vulnerability-Lookup

GHSA-MP5V-46H8-GW29

Vulnerability from github – Published: 2026-08-25 15:32 – Updated: 2026-08-25 15:32

Details

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.

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-77998"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-25T13:19:30Z",
    "severity": "CRITICAL"
  },
  "details": "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": "GHSA-mp5v-46h8-gw29",
  "modified": "2026-08-25T15:32:59Z",
  "published": "2026-08-25T15:32:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77998"
    },
    {
      "type": "WEB",
      "url": "https://www.miniorange.com"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-77998 (GCVE-0-2026-77998)

Vulnerability from cvelistv5 – Published: 2026-08-25 12:50 – Updated: 2026-08-26 07:01

Title

Summary

Severity

10 (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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-25 14:38 UTC

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

Joomla mitre root

References

1 reference

URL	Tags
https://www.miniorange.com/	product

Impacted products

3 products

Vendor	Product	Version
miniorange.com	SAML SSO for Joomla extension for Joomla	Affected: 1.0.0-11.0.1
miniorange.com	SAML SP Single Sign On – Login with ADFS extension for Joomla	Affected: 1.0.0-6.3.0
miniorange.com	SAML SSO login with Google Apps extension for Joomla	Affected: 1.0.0-6.3.0

Credits

Supakiad S. (m3ez) Phil Taylor, mysites.guru

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-77998",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-25T14:38:55.305998Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-25T14:51:54.057Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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            {
              "status": "affected",
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            }
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        },
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          "vendor": "miniorange.com",
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            }
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            "Recovery": "NOT_DEFINED",
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      "providerMetadata": {
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      "references": [
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          "tags": [
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          "url": "https://www.miniorange.com/"
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      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "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",
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    "datePublished": "2026-08-25T12:50:46.506Z",
    "dateReserved": "2026-08-21T19:23:55.924Z",
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  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-MP5V-46H8-GW29

CVE-2026-77998 (GCVE-0-2026-77998)

Tags

Sightings

Nomenclature