FKIE_CVE-2025-53479

Vulnerability from fkie_nvd - Published: 2025-07-08 18:15 - Updated: 2026-06-17 09:38
Severity
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Summary
The CheckUser extension’s Special:CheckUser interface is vulnerable to reflected XSS via the rev-deleted-user message. This message is rendered without proper escaping, making it possible to inject JavaScript through the uselang=x-xss language override mechanism. This issue affects Mediawiki - CheckUser extension: from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.
References
c4f26cc8-17ff-4c99-b5e2-38fc1793eacchttps://gerrit.wikimedia.org/r/q/I159e14543912cb3bc7f4a00c3090c0285b154786
c4f26cc8-17ff-4c99-b5e2-38fc1793eacchttps://phabricator.wikimedia.org/T394693
134c704f-9b21-4f2e-91b3-4a467353bcc0https://phabricator.wikimedia.org/T394693
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Mediawiki - CheckUser extension",
          "vendor": "Wikimedia Foundation",
          "versions": [
            {
              "lessThan": "1.42.7",
              "status": "affected",
              "version": "1.42.x",
              "versionType": "semver"
            },
            {
              "lessThan": "1.43.2",
              "status": "affected",
              "version": "1.43.x",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The CheckUser extension\u2019s Special:CheckUser interface is vulnerable to reflected XSS via the rev-deleted-user message. This message is rendered without proper escaping, making it possible to inject JavaScript through the uselang=x-xss language override mechanism.\n\n\n\n\nThis issue affects Mediawiki - CheckUser extension: from 1.42.X before 1.42.7, from 1.43.X before 1.43.2."
    },
    {
      "lang": "es",
      "value": "La interfaz Special:CheckUser de la extensi\u00f3n CheckUser es vulnerable a XSS reflejado mediante el mensaje rev-deleted-user. Este mensaje se procesa sin el escape adecuado, lo que permite inyectar JavaScript mediante el mecanismo de anulaci\u00f3n del lenguaje uselang=x-xss. Este problema afecta a Mediawiki - extensi\u00f3n CheckUser: desde la versi\u00f3n 1.39.X hasta la 1.39.13, desde la versi\u00f3n 1.42.X hasta la 1.42.7, desde la versi\u00f3n 1.43.X hasta la 1.43.2."
    }
  ],
  "id": "CVE-2025-53479",
  "lastModified": "2026-06-17T09:38:17.057",
  "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-53479",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-07-10T13:18:02.588187Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-07-08T18:15:40.387",
  "references": [
    {
      "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
      "url": "https://gerrit.wikimedia.org/r/q/I159e14543912cb3bc7f4a00c3090c0285b154786"
    },
    {
      "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
      "url": "https://phabricator.wikimedia.org/T394693"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://phabricator.wikimedia.org/T394693"
    }
  ],
  "sourceIdentifier": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
      "type": "Secondary"
    }
  ]
}



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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.



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.