CVE-2025-54982 (GCVE-0-2025-54982)

Vulnerability from cvelistv5 – Published: 2025-08-05 05:36 – Updated: 2025-08-19 03:55
VLAI?
Summary
An improper verification of cryptographic signature in Zscaler's SAML authentication mechanism on the server-side allowed an authentication abuse.
Severity ?
9.6 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
Zscaler Authentication Server Affected: 0 , < 6.2r (custom)
Create a notification for this product.
Credits
Richard Warren, AmberWolf
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-54982",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-18T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-19T03:55:32.202Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Authentication Server",
          "vendor": "Zscaler",
          "versions": [
            {
              "lessThan": "6.2r",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Richard Warren, AmberWolf"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eAn improper verification of cryptographic signature in Zscaler\u0027s SAML authentication mechanism on the server-side allowed an authentication abuse.\u003c/span\u003e\u003cbr\u003e"
            }
          ],
          "value": "An improper verification of cryptographic signature in Zscaler\u0027s SAML authentication mechanism on the server-side allowed an authentication abuse."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-114",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-114 Authentication Abuse"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 9.6,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347 Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-05T05:36:06.752Z",
        "orgId": "73c6f63b-efac-410d-a0a9-569700f85a04",
        "shortName": "Zscaler"
      },
      "references": [
        {
          "url": "https://help.zscaler.com/zia/about-identity-providers"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "SAML 2.0 Public Key Validation Issue",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "73c6f63b-efac-410d-a0a9-569700f85a04",
    "assignerShortName": "Zscaler",
    "cveId": "CVE-2025-54982",
    "datePublished": "2025-08-05T05:36:06.752Z",
    "dateReserved": "2025-08-04T14:51:53.367Z",
    "dateUpdated": "2025-08-19T03:55:32.202Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-54982\",\"sourceIdentifier\":\"cve@zscaler.com\",\"published\":\"2025-08-05T06:15:26.437\",\"lastModified\":\"2025-08-05T14:34:17.327\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An improper verification of cryptographic signature in Zscaler\u0027s SAML authentication mechanism on the server-side allowed an authentication abuse.\"},{\"lang\":\"es\",\"value\":\"Una verificaci\u00f3n incorrecta de la firma criptogr\u00e1fica en el mecanismo de autenticaci\u00f3n de Zscaler\u0027s SAML en el lado del servidor permiti\u00f3 un abuso de autenticaci\u00f3n.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@zscaler.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N\",\"baseScore\":9.6,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.1,\"impactScore\":5.8}]},\"weaknesses\":[{\"source\":\"cve@zscaler.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-347\"}]}],\"references\":[{\"url\":\"https://help.zscaler.com/zia/about-identity-providers\",\"source\":\"cve@zscaler.com\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-54982\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-08-05T15:58:54.748472Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-08-05T15:59:06.512Z\"}}], \"cna\": {\"title\": \"SAML 2.0 Public Key Validation Issue\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Richard Warren, AmberWolf\"}], \"impacts\": [{\"capecId\": \"CAPEC-114\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-114 Authentication Abuse\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 9.6, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Zscaler\", \"product\": \"Authentication Server\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"6.2r\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://help.zscaler.com/zia/about-identity-providers\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"An improper verification of cryptographic signature in Zscaler\u0027s SAML authentication mechanism on the server-side allowed an authentication abuse.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eAn improper verification of cryptographic signature in Zscaler\u0027s SAML authentication mechanism on the server-side allowed an authentication abuse.\u003c/span\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-347\", \"description\": \"CWE-347 Improper Verification of Cryptographic Signature\"}]}], \"providerMetadata\": {\"orgId\": \"73c6f63b-efac-410d-a0a9-569700f85a04\", \"shortName\": \"Zscaler\", \"dateUpdated\": \"2025-08-05T05:36:06.752Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-54982\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-08-19T03:55:32.202Z\", \"dateReserved\": \"2025-08-04T14:51:53.367Z\", \"assignerOrgId\": \"73c6f63b-efac-410d-a0a9-569700f85a04\", \"datePublished\": \"2025-08-05T05:36:06.752Z\", \"assignerShortName\": \"Zscaler\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.