fkie_cve-2025-54812
Vulnerability from fkie_nvd
Published
2025-08-22 19:15
Modified
2025-08-26 21:16
Severity ?
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Summary
Improper Output Neutralization for Logs vulnerability in Apache Log4cxx. When using HTMLLayout, logger names are not properly escaped when writing out to the HTML file. If untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user. In order to activate this, the following sequence must occur: * Log4cxx is configured to use HTMLLayout. * Logger name comes from an untrusted string * Logger with compromised name logs a message * User opens the generated HTML log file in their browser, leading to potential XSS Because logger names are generally constant strings, we assess the impact to users as LOW This issue affects Apache Log4cxx: before 1.5.0. Users are recommended to upgrade to version 1.5.0, which fixes the issue.
References
security@apache.orghttps://github.com/apache/logging-log4cxx/pull/509Issue Tracking, Patch
security@apache.orghttps://github.com/apache/logging-log4cxx/pull/514Issue Tracking, Patch
security@apache.orghttps://logging.apache.org/security.html#CVE-2025-54812Vendor Advisory
Impacted products
Vendor Product Version
apache log4cxx *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:log4cxx:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8E1443DD-B968-4005-A287-964C6197FEB0",
              "versionEndExcluding": "1.5.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper Output Neutralization for Logs vulnerability in Apache Log4cxx.\n\n\nWhen using HTMLLayout, logger names are not properly escaped when writing out to the HTML file.\nIf untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user.\nIn order to activate this, the following sequence must occur:\n\n\n\n  *  Log4cxx is configured to use HTMLLayout.\n\n  *  Logger name comes from an untrusted string\n\n  *  Logger with compromised name logs a message\n\n  *  User opens the generated HTML log file in their browser, leading to potential XSS\n\n\nBecause logger names are generally constant strings, we assess the impact to users as LOW\n\n\nThis issue affects Apache Log4cxx: before 1.5.0.\n\n\nUsers are recommended to upgrade to version 1.5.0, which fixes the issue."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de neutralizaci\u00f3n de salida incorrecta para registros en Apache Log4cxx. Al usar HTMLLayout, los nombres de registradores no se escapan correctamente al escribir en el archivo HTML. Si se usan datos no confiables para recuperar el nombre de un registrador, un atacante podr\u00eda, en teor\u00eda, inyectar HTML o Javascript para ocultar informaci\u00f3n de los registros o robar datos del usuario. Para activar esto, debe ocurrir la siguiente secuencia: * Log4cxx est\u00e1 configurado para usar HTMLLayout. * El nombre del registrador proviene de una cadena no confiable * El registrador con nombre comprometido registra un mensaje * El usuario abre el archivo de registro HTML generado en su navegador, lo que lleva a un posible XSS Debido a que los nombres de registradores generalmente son cadenas constantes, evaluamos el impacto para los usuarios como BAJO Este problema afecta a Apache Log4cxx: antes de 1.5.0. Se recomienda a los usuarios actualizar a la versi\u00f3n 1.5.0, que soluciona el problema."
    }
  ],
  "id": "CVE-2025-54812",
  "lastModified": "2025-08-26T21:16:55.323",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 2.1,
          "baseSeverity": "LOW",
          "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": "NONE",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "LOW",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security@apache.org",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-08-22T19:15:39.803",
  "references": [
    {
      "source": "security@apache.org",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/apache/logging-log4cxx/pull/509"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/apache/logging-log4cxx/pull/514"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://logging.apache.org/security.html#CVE-2025-54812"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-117"
        }
      ],
      "source": "security@apache.org",
      "type": "Primary"
    }
  ]
}


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 seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.