CVE-2026-2861

Estado: ModificadaMedia (5.5)—

A vulnerability was detected in Foswiki up to 2.1.10. The affected element is an unknown function of the component Changes/Viewfile/Oops. The manipulation results in information disclosure. It is possible to launch the attack remotely. The exploit is now public and may be used. Upgrading to version 2.1.11 is sufficient to fix this issue. The patch is identified as 31aeecb58b64/d8ed86b10e46. Upgrading the affected component is recommended.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.74%
Percentil entre todas las CVEs puntuadas: 53
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Foswiki — Foswiki

CWE

CWE-200, CWE-284
NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-2861",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-2861",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-23T19:27:50.200482Z"
        }
      }
    ],
    "cvssMetricV2": [
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        "type": "Secondary",
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        "cvssData": {
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "cna@vuldb.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "cna@vuldb.com",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 5.5,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
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  },
  "affected": [
    {
      "source": "cna@vuldb.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "modules": [
            "Changes/Viewfile/Oops"
          ],
          "product": "Foswiki",
          "versions": [
            {
              "status": "affected",
              "version": "2.1.0"
            },
            {
              "status": "affected",
              "version": "2.1.1"
            },
            {
              "status": "affected",
              "version": "2.1.2"
            },
            {
              "status": "affected",
              "version": "2.1.3"
            },
            {
              "status": "affected",
              "version": "2.1.4"
            },
            {
              "status": "affected",
              "version": "2.1.5"
            },
            {
              "status": "affected",
              "version": "2.1.6"
            },
            {
              "status": "affected",
              "version": "2.1.7"
            },
            {
              "status": "affected",
              "version": "2.1.8"
            },
            {
              "status": "affected",
              "version": "2.1.9"
            },
            {
              "status": "affected",
              "version": "2.1.10"
            },
            {
              "status": "unaffected",
              "version": "2.1.11"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-02-21T06:17:01.897",
  "references": [
    {
      "url": "https://foswiki.org/Tasks/Item15600",
      "tags": [
        "Permissions Required"
      ],
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://foswiki.org/Tasks/Item15601",
      "tags": [
        "Permissions Required"
      ],
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://github.com/foswiki/distro/commit/31aeecb58b64",
      "tags": [
        "Patch"
      ],
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/?ctiid.347101",
      "tags": [
        "Permissions Required",
        "VDB Entry"
      ],
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/?id.347101",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/?submit.753966",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "cna@vuldb.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/03/15/1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "http://www.openwall.com/lists/oss-security/2026/03/16/1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "http://www.openwall.com/lists/oss-security/2026/03/16/3",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cna@vuldb.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        },
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was detected in Foswiki up to 2.1.10. The affected element is an unknown function of the component Changes/Viewfile/Oops. The manipulation results in information disclosure. It is possible to launch the attack remotely. The exploit is now public and may be used. Upgrading to version 2.1.11 is sufficient to fix this issue. The patch is identified as 31aeecb58b64/d8ed86b10e46. Upgrading the affected component is recommended."
    },
    {
      "lang": "es",
      "value": "Se detectó una vulnerabilidad en Foswiki hasta 2.1.10 que afecta a una función desconocida del componente Changes/Viewfile/Oops. Si se manipula se puede lograr una revelación de información. Es posible lanzar el ataque en remoto. El exploit es ahora público y puede ser utilizado. Con actualizar a la versión 2.1.11 es suficiente para solucionar este problema. El parche se identifica como 31aeecb58b64/d8ed86b10e46. Se recomienda actualizar el componente afectado."
    }
  ],
  "lastModified": "2026-06-17T10:31:54.357",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:foswiki:foswiki:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "58364C1A-BFC0-41CC-BCA9-D35A74E1001D",
              "versionEndExcluding": "2.1.11"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cna@vuldb.com"
}