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

CVE-2021-40509 (GCVE-0-2021-40509)

Vulnerability from cvelistv5 – Published: 2021-09-04 19:20 – Updated: 2024-08-04 02:44
VLAI
Summary
ViewCommon.java in JForum2 2.7.0 allows XSS via a user signature.
CWE
  • n/a
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T02:44:10.849Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://lists.openwall.net/full-disclosure/2021/09/03/7"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://sourceforge.net/p/jforum2/code/934/"
          },
          {
            "name": "20210907 Re: a xss vulnerability in Jforum 2.7.0",
            "tags": [
              "mailing-list",
              "x_refsource_FULLDISC",
              "x_transferred"
            ],
            "url": "http://seclists.org/fulldisclosure/2021/Sep/13"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "ViewCommon.java in JForum2 2.7.0 allows XSS via a user signature."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-09-08T20:06:13.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://lists.openwall.net/full-disclosure/2021/09/03/7"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://sourceforge.net/p/jforum2/code/934/"
        },
        {
          "name": "20210907 Re: a xss vulnerability in Jforum 2.7.0",
          "tags": [
            "mailing-list",
            "x_refsource_FULLDISC"
          ],
          "url": "http://seclists.org/fulldisclosure/2021/Sep/13"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-40509",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "ViewCommon.java in JForum2 2.7.0 allows XSS via a user signature."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html"
            },
            {
              "name": "https://lists.openwall.net/full-disclosure/2021/09/03/7",
              "refsource": "MISC",
              "url": "https://lists.openwall.net/full-disclosure/2021/09/03/7"
            },
            {
              "name": "https://sourceforge.net/p/jforum2/code/934/",
              "refsource": "MISC",
              "url": "https://sourceforge.net/p/jforum2/code/934/"
            },
            {
              "name": "20210907 Re: a xss vulnerability in Jforum 2.7.0",
              "refsource": "FULLDISC",
              "url": "http://seclists.org/fulldisclosure/2021/Sep/13"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-40509",
    "datePublished": "2021-09-04T19:20:00.000Z",
    "dateReserved": "2021-09-04T00:00:00.000Z",
    "dateUpdated": "2024-08-04T02:44:10.849Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-40509",
      "date": "2026-09-19",
      "epss": "0.00958",
      "percentile": "0.59942"
    },
    "fkie_nvd": {
      "configurations": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:jforum:jforum:2.7.0:*:*:*:*:*:*:*",
                  "matchCriteriaId": "645CD471-4B45-48A4-A20D-3F76300C63B4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "ViewCommon.java in JForum2 2.7.0 allows XSS via a user signature."
        },
        {
          "lang": "es",
          "value": "El archivo ViewCommon.java en Jforum versi\u00f3n 2 2.7.0, permite un ataque de tipo XSS por medio de una firma de usuario"
        }
      ],
      "id": "CVE-2021-40509",
      "lastModified": "2024-11-21T06:24:17.347",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "LOW",
            "cvssData": {
              "accessComplexity": "MEDIUM",
              "accessVector": "NETWORK",
              "authentication": "SINGLE",
              "availabilityImpact": "NONE",
              "baseScore": 3.5,
              "confidentialityImpact": "NONE",
              "integrityImpact": "PARTIAL",
              "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
              "version": "2.0"
            },
            "exploitabilityScore": 6.8,
            "impactScore": 2.9,
            "obtainAllPrivilege": false,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "source": "nvd@nist.gov",
            "type": "Primary",
            "userInteractionRequired": true
          }
        ],
        "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"
          }
        ]
      },
      "published": "2021-09-04T20:15:07.420",
      "references": [
        {
          "source": "cve@mitre.org",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html"
        },
        {
          "source": "cve@mitre.org",
          "tags": [
            "Mailing List",
            "Third Party Advisory"
          ],
          "url": "http://seclists.org/fulldisclosure/2021/Sep/13"
        },
        {
          "source": "cve@mitre.org",
          "tags": [
            "Exploit",
            "Mailing List",
            "Third Party Advisory"
          ],
          "url": "https://lists.openwall.net/full-disclosure/2021/09/03/7"
        },
        {
          "source": "cve@mitre.org",
          "tags": [
            "Patch",
            "Third Party Advisory"
          ],
          "url": "https://sourceforge.net/p/jforum2/code/934/"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Mailing List",
            "Third Party Advisory"
          ],
          "url": "http://seclists.org/fulldisclosure/2021/Sep/13"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Exploit",
            "Mailing List",
            "Third Party Advisory"
          ],
          "url": "https://lists.openwall.net/full-disclosure/2021/09/03/7"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch",
            "Third Party Advisory"
          ],
          "url": "https://sourceforge.net/p/jforum2/code/934/"
        }
      ],
      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-79"
            }
          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "n/a",
                "vendor": "n/a",
                "versions": [
                  {
                    "status": "affected",
                    "version": "n/a"
                  }
                ]
              }
            ],
            "source": "cve@mitre.org"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:jforum:jforum:2.7.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "645CD471-4B45-48A4-A20D-3F76300C63B4",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "ViewCommon.java in JForum2 2.7.0 allows XSS via a user signature."
          },
          {
            "lang": "es",
            "value": "El archivo ViewCommon.java en Jforum versi\u00f3n 2 2.7.0, permite un ataque de tipo XSS por medio de una firma de usuario"
          }
        ],
        "id": "CVE-2021-40509",
        "lastModified": "2026-06-17T04:07:03.933",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "LOW",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "SINGLE",
                "availabilityImpact": "NONE",
                "baseScore": 3.5,
                "confidentialityImpact": "NONE",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 6.8,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": true
            }
          ],
          "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"
            }
          ]
        },
        "published": "2021-09-04T20:15:07.420",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2021/Sep/13"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit",
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.openwall.net/full-disclosure/2021/09/03/7"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://sourceforge.net/p/jforum2/code/934/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2021/Sep/13"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.openwall.net/full-disclosure/2021/09/03/7"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://sourceforge.net/p/jforum2/code/934/"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-79"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T13:34:16+00:00",
      "cve": "CVE-2021-40509",
      "id": "CVE-2021-40509",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CVE-2021-40509",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-40509.json",
      "version": "3"
    }
  }
}



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…