CVE-2025-8571 (GCVE-0-2025-8571)

Vulnerability from cvelistv5 – Published: 2025-08-05 22:37 – Updated: 2025-08-06 20:25
VLAI?
Summary
Concrete CMS 9 to 9.4.2 and versions below 8.5.21 are vulnerable to Reflected Cross-Site Scripting (XSS) in the Conversation Messages Dashboard Page. Unsanitized input could cause theft of session cookies or tokens, defacement of web content, redirection to malicious sites, and (if victim is an admin), the execution of unauthorized actions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Fortbridge https://fortbridge.co.uk/  for performing a penetration test and vulnerability assessment on Concrete CMS and reporting this issue.
Severity ?
4.8 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
Concrete CMS Concrete CMS Affected: 9.0.0 , < 9.4.3 (patch)
Affected: 5.6 , < 8.5.21 (patch)
Create a notification for this product.
Credits
Fortbridge
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-8571",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-06T16:14:47.226664Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-06T20:25:03.661Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Concrete CMS",
          "repo": "https://github.com/concretecms/concretecms",
          "vendor": "Concrete CMS",
          "versions": [
            {
              "lessThan": "9.4.3",
              "status": "affected",
              "version": "9.0.0",
              "versionType": "patch"
            },
            {
              "lessThan": "8.5.21",
              "status": "affected",
              "version": "5.6",
              "versionType": "patch"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Fortbridge"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Concrete CMS 9 to 9.4.2 and versions below 8.5.21 are vulnerable to Reflected Cross-Site Scripting (XSS) in the Conversation Messages Dashboard Page.\u0026nbsp;Unsanitized input could cause theft of session cookies or tokens, defacement of web content, redirection to malicious sites, and (if victim is an admin), the execution of unauthorized actions.\u0026nbsp;\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eThe Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N.\u0026nbsp;\u003c/span\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eThanks \u003c/span\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://fortbridge.co.uk/\"\u003eFortbridge\u003c/a\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u0026nbsp;for performing a penetration test and vulnerability assessment on Concrete CMS and reporting this issue.\u003c/span\u003e\u003cbr\u003e"
            }
          ],
          "value": "Concrete CMS 9 to 9.4.2 and versions below 8.5.21 are vulnerable to Reflected Cross-Site Scripting (XSS) in the Conversation Messages Dashboard Page.\u00a0Unsanitized input could cause theft of session cookies or tokens, defacement of web content, redirection to malicious sites, and (if victim is an admin), the execution of unauthorized actions.\u00a0The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N.\u00a0Thanks  Fortbridge https://fortbridge.co.uk/ \u00a0for performing a penetration test and vulnerability assessment on Concrete CMS and reporting this issue."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-591",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-591 Reflected XSS"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20 Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-05T22:37:14.759Z",
        "orgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de",
        "shortName": "ConcreteCMS"
      },
      "references": [
        {
          "url": "https://documentation.concretecms.org/developers/introduction/version-history/8521-release-notes"
        },
        {
          "url": "https://documentation.concretecms.org/9-x/developers/introduction/version-history/943-release-notes"
        },
        {
          "url": "https://www.concretecms.org/download"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Concrete CMS 9 through 9.4.2 and below 8.5.21 is vulnerable to Reflected Cross-Site Scripting (XSS) in Conversation Messages Dashboard Page",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de",
    "assignerShortName": "ConcreteCMS",
    "cveId": "CVE-2025-8571",
    "datePublished": "2025-08-05T22:37:14.759Z",
    "dateReserved": "2025-08-04T21:50:20.743Z",
    "dateUpdated": "2025-08-06T20:25:03.661Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-8571\",\"sourceIdentifier\":\"ff5b8ace-8b95-4078-9743-eac1ca5451de\",\"published\":\"2025-08-05T23:15:38.493\",\"lastModified\":\"2025-09-04T15:54:06.360\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Concrete CMS 9 to 9.4.2 and versions below 8.5.21 are vulnerable to Reflected Cross-Site Scripting (XSS) in the Conversation Messages Dashboard Page.\u00a0Unsanitized input could cause theft of session cookies or tokens, defacement of web content, redirection to malicious sites, and (if victim is an admin), the execution of unauthorized actions.\u00a0The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N.\u00a0Thanks  Fortbridge https://fortbridge.co.uk/ \u00a0for performing a penetration test and vulnerability assessment on Concrete CMS and reporting this issue.\"},{\"lang\":\"es\",\"value\":\"Concrete CMS 9 a 9.4.2 y versiones anteriores a la 8.5.21 son vulnerables a ataques de Cross-Site Scripting (XSS) reflejado en la p\u00e1gina del panel de mensajes de conversaci\u00f3n. La entrada no depurada podr\u00eda provocar el robo de cookies o tokens de sesi\u00f3n, la desfiguraci\u00f3n del contenido web, la redirecci\u00f3n a sitios maliciosos y (si la v\u00edctima es administrador), la ejecuci\u00f3n de acciones no autorizadas. El equipo de seguridad de Concrete CMS otorg\u00f3 a esta vulnerabilidad una puntuaci\u00f3n de 4.8 en CVSS v.4.0 con el vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Gracias a Fortbridge (https://fortbridge.co.uk/) por realizar una prueba de penetraci\u00f3n y una evaluaci\u00f3n de vulnerabilidades en Concrete CMS e informar de este problema.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"ff5b8ace-8b95-4078-9743-eac1ca5451de\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/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\",\"baseScore\":4.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"PASSIVE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"LOW\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N\",\"baseScore\":4.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.7,\"impactScore\":2.7}]},\"weaknesses\":[{\"source\":\"ff5b8ace-8b95-4078-9743-eac1ca5451de\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"8.5.21\",\"matchCriteriaId\":\"414E2949-3A12-45EB-8B1B-5BA3CF318CAB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.0\",\"versionEndExcluding\":\"9.4.3\",\"matchCriteriaId\":\"C19307FC-CE44-49FB-AF45-748240634883\"}]}]}],\"references\":[{\"url\":\"https://documentation.concretecms.org/9-x/developers/introduction/version-history/943-release-notes\",\"source\":\"ff5b8ace-8b95-4078-9743-eac1ca5451de\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://documentation.concretecms.org/developers/introduction/version-history/8521-release-notes\",\"source\":\"ff5b8ace-8b95-4078-9743-eac1ca5451de\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://www.concretecms.org/download\",\"source\":\"ff5b8ace-8b95-4078-9743-eac1ca5451de\",\"tags\":[\"Product\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-8571\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-08-06T16:14:47.226664Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-08-06T16:14:48.715Z\"}}], \"cna\": {\"title\": \"Concrete CMS 9 through 9.4.2 and below 8.5.21 is vulnerable to Reflected Cross-Site Scripting (XSS) in Conversation Messages Dashboard Page\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Fortbridge\"}], \"impacts\": [{\"capecId\": \"CAPEC-591\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-591 Reflected XSS\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 4.8, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"PASSIVE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"HIGH\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"LOW\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/concretecms/concretecms\", \"vendor\": \"Concrete CMS\", \"product\": \"Concrete CMS\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.0.0\", \"lessThan\": \"9.4.3\", \"versionType\": \"patch\"}, {\"status\": \"affected\", \"version\": \"5.6\", \"lessThan\": \"8.5.21\", \"versionType\": \"patch\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://documentation.concretecms.org/developers/introduction/version-history/8521-release-notes\"}, {\"url\": \"https://documentation.concretecms.org/9-x/developers/introduction/version-history/943-release-notes\"}, {\"url\": \"https://www.concretecms.org/download\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Concrete CMS 9 to 9.4.2 and versions below 8.5.21 are vulnerable to Reflected Cross-Site Scripting (XSS) in the Conversation Messages Dashboard Page.\\u00a0Unsanitized input could cause theft of session cookies or tokens, defacement of web content, redirection to malicious sites, and (if victim is an admin), the execution of unauthorized actions.\\u00a0The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N.\\u00a0Thanks  Fortbridge https://fortbridge.co.uk/ \\u00a0for performing a penetration test and vulnerability assessment on Concrete CMS and reporting this issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Concrete CMS 9 to 9.4.2 and versions below 8.5.21 are vulnerable to Reflected Cross-Site Scripting (XSS) in the Conversation Messages Dashboard Page.\u0026nbsp;Unsanitized input could cause theft of session cookies or tokens, defacement of web content, redirection to malicious sites, and (if victim is an admin), the execution of unauthorized actions.\u0026nbsp;\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eThe Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N.\u0026nbsp;\u003c/span\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eThanks \u003c/span\u003e\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://fortbridge.co.uk/\\\"\u003eFortbridge\u003c/a\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003e\u0026nbsp;for performing a penetration test and vulnerability assessment on Concrete CMS and reporting this issue.\u003c/span\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-20\", \"description\": \"CWE-20 Improper Input Validation\"}]}], \"providerMetadata\": {\"orgId\": \"ff5b8ace-8b95-4078-9743-eac1ca5451de\", \"shortName\": \"ConcreteCMS\", \"dateUpdated\": \"2025-08-05T22:37:14.759Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-8571\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-08-06T20:25:03.661Z\", \"dateReserved\": \"2025-08-04T21:50:20.743Z\", \"assignerOrgId\": \"ff5b8ace-8b95-4078-9743-eac1ca5451de\", \"datePublished\": \"2025-08-05T22:37:14.759Z\", \"assignerShortName\": \"ConcreteCMS\"}",
      "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.