GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2025-5591 (GCVE-0-2025-5591)

Vulnerability from cvelistv5 – Published: 2026-01-05 00:02 – Updated: 2026-01-05 20:34
VLAI
Title
Stored Cross-site Scripting (XSS) in Kentico Xperience 13
Summary
Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user’s session and perform actions in their security context.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-05 20:33 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
  • CWE-1188 - Insecure Default Initialization of Resource
Assigner
TML
Impacted products
Vendor Product Version CPE status
Kentico Kentico Xperience Affected: 13.0.167
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-5591",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-05T20:33:51.339028Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-05T20:34:18.323Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "Kentico Xperience",
          "vendor": "Kentico",
          "versions": [
            {
              "status": "affected",
              "version": "13.0.167"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Michael Nervo"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user\u2019s session and perform actions in their security context."
            }
          ],
          "value": "Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user\u2019s session and perform actions in their security context."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-593",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-593 Session Hijacking"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "UNREPORTED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1188",
              "description": "CWE-1188 Insecure Default Initialization of Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-05T00:02:51.266Z",
        "orgId": "07aac9b9-e3e9-4d03-a447-764bd31371d7",
        "shortName": "TML"
      },
      "references": [
        {
          "url": "https://www.themissinglink.com.au/security-advisories/cve-2025-5591"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Change Kentico\u0027s default configuration as per the vendor\u0027s advisory:\u003cbr\u003e\u003cdiv\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://docs.kentico.com/13/configuring-xperience/reference-web-config-application-keys#security-settings\"\u003ehttps://docs.kentico.com/13/configuring-xperience/reference-web-config-application-keys#security-set...\u003c/a\u003e\u003c/div\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://docs.kentico.com/13/macro-expressions/reference-macro-methods#advanced-text-processing\"\u003ehttps://docs.kentico.com/13/macro-expressions/reference-macro-methods#advanced-text-processing\u003c/a\u003e\u003cbr\u003e"
            }
          ],
          "value": "Change Kentico\u0027s default configuration as per the vendor\u0027s advisory:\n https://docs.kentico.com/13/macro-expressions/reference-macro-methods#advanced-text-processing"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Stored Cross-site Scripting (XSS) in Kentico Xperience 13",
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "07aac9b9-e3e9-4d03-a447-764bd31371d7",
    "assignerShortName": "TML",
    "cveId": "CVE-2025-5591",
    "datePublished": "2026-01-05T00:02:51.266Z",
    "dateReserved": "2025-06-04T00:11:17.246Z",
    "dateUpdated": "2026-01-05T20:34:18.323Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-5591",
      "date": "2026-09-16",
      "epss": "0.00169",
      "percentile": "0.06623"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-5591\",\"sourceIdentifier\":\"vdp@themissinglink.com.au\",\"published\":\"2026-01-05T01:15:51.617\",\"lastModified\":\"2026-06-17T09:48:14.200\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user\u2019s session and perform actions in their security context.\"}],\"affected\":[{\"source\":\"vdp@themissinglink.com.au\",\"affectedData\":[{\"vendor\":\"Kentico\",\"product\":\"Kentico Xperience\",\"defaultStatus\":\"affected\",\"versions\":[{\"version\":\"13.0.167\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"vdp@themissinglink.com.au\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/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\":7.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"PASSIVE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"HIGH\",\"subIntegrityImpact\":\"HIGH\",\"subAvailabilityImpact\":\"HIGH\",\"exploitMaturity\":\"UNREPORTED\",\"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:L/UI:R/S:C/C:L/I:L/A:N\",\"baseScore\":5.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.3,\"impactScore\":2.7}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-01-05T20:33:51.339028Z\",\"id\":\"CVE-2025-5591\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"vdp@themissinglink.com.au\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"},{\"lang\":\"en\",\"value\":\"CWE-1188\"}]},{\"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:kentico:xperience:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"13.0.0\",\"versionEndExcluding\":\"13.0.167\",\"matchCriteriaId\":\"C1E6D459-B07A-4009-83D9-3A51360D29A9\"}]}]}],\"references\":[{\"url\":\"https://www.themissinglink.com.au/security-advisories/cve-2025-5591\",\"source\":\"vdp@themissinglink.com.au\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-01-06T00:19:10+00:00",
      "cve": "CVE-2025-5591",
      "id": "CVE-2025-5591",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Stored Cross-site Scripting (XSS) in Kentico Xperience 13",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-5591.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-5591\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-05T20:33:51.339028Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-05T20:34:10.485Z\"}}], \"cna\": {\"title\": \"Stored Cross-site Scripting (XSS) in Kentico Xperience 13\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Michael Nervo\"}], \"impacts\": [{\"capecId\": \"CAPEC-593\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-593 Session Hijacking\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 7.7, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U\", \"exploitMaturity\": \"UNREPORTED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"PASSIVE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"HIGH\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"HIGH\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"HIGH\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Kentico\", \"product\": \"Kentico Xperience\", \"versions\": [{\"status\": \"affected\", \"version\": \"13.0.167\"}], \"defaultStatus\": \"affected\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Change Kentico\u0027s default configuration as per the vendor\u0027s advisory:\\n https://docs.kentico.com/13/macro-expressions/reference-macro-methods#advanced-text-processing\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Change Kentico\u0027s default configuration as per the vendor\u0027s advisory:\u003cbr\u003e\u003cdiv\u003e\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://docs.kentico.com/13/configuring-xperience/reference-web-config-application-keys#security-settings\\\"\u003ehttps://docs.kentico.com/13/configuring-xperience/reference-web-config-application-keys#security-set...\u003c/a\u003e\u003c/div\u003e\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://docs.kentico.com/13/macro-expressions/reference-macro-methods#advanced-text-processing\\\"\u003ehttps://docs.kentico.com/13/macro-expressions/reference-macro-methods#advanced-text-processing\u003c/a\u003e\u003cbr\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://www.themissinglink.com.au/security-advisories/cve-2025-5591\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.5.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user\\u2019s session and perform actions in their security context.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user\\u2019s session and perform actions in their security context.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1188\", \"description\": \"CWE-1188 Insecure Default Initialization of Resource\"}]}], \"providerMetadata\": {\"orgId\": \"07aac9b9-e3e9-4d03-a447-764bd31371d7\", \"shortName\": \"TML\", \"dateUpdated\": \"2026-01-05T00:02:51.266Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-5591\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T20:34:18.323Z\", \"dateReserved\": \"2025-06-04T00:11:17.246Z\", \"assignerOrgId\": \"07aac9b9-e3e9-4d03-a447-764bd31371d7\", \"datePublished\": \"2026-01-05T00:02:51.266Z\", \"assignerShortName\": \"TML\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


Loading…