Vulnerability-Lookup

GHSA-2CH2-J7QP-PQM3

Vulnerability from github – Published: 2026-04-01 03:31 – Updated: 2026-04-01 03:31

Details

XenForo before 2.3.9 is vulnerable to stored cross-site scripting (XSS) related to BB code rendering. An attacker can inject malicious scripts through BB code that are stored and executed when other users view the content.

Severity

6.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

5.1 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-35054"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-01T01:16:41Z",
    "severity": "MODERATE"
  },
  "details": "XenForo before 2.3.9 is vulnerable to stored cross-site scripting (XSS) related to BB code rendering. An attacker can inject malicious scripts through BB code that are stored and executed when other users view the content.",
  "id": "GHSA-2ch2-j7qp-pqm3",
  "modified": "2026-04-01T03:31:40Z",
  "published": "2026-04-01T03:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35054"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-code-rendering"
    },
    {
      "type": "WEB",
      "url": "https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-35054 (GCVE-0-2026-35054)

Vulnerability from cvelistv5 – Published: 2026-04-01 00:30 – Updated: 2026-05-24 01:37

Title

XenForo Stored Cross-Site Scripting via BB Code Rendering

Summary

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

6.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

VulnCheck

References

2 references

URL	Tags
https://xenforo.com/community/threads/xenforo-2-3…	vendor-advisorypatch
https://www.vulncheck.com/advisories/xenforo-stor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
XenForo	XenForo	Affected: 2.3.0 , < 2.3.9 (semver)

Date Public

2026-02-05 00:00

Credits

Antisocial

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-35054",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-01T13:35:47.909843Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-01T13:37:39.225Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      }
    ],
    "cna": {
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          "vendor": "XenForo",
          "versions": [
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              "lessThan": "2.3.9",
              "status": "affected",
              "version": "2.3.0",
              "versionType": "semver"
            }
          ]
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      ],
      "cpeApplicability": [
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                  "versionStartIncluding": "2.3.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Antisocial"
        }
      ],
      "datePublic": "2026-02-05T00:00:00.000Z",
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        {
          "lang": "en",
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      "metrics": [
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            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "exploitMaturity": "NOT_DEFINED",
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            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
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            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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      "providerMetadata": {
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      },
      "references": [
        {
          "name": "XenForo 2.3.9 (inc XFMG) \u0026 2.2.18 Released (Security Fix)",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/"
        },
        {
          "name": "VulnCheck Advisory: XenForo Stored Cross-Site Scripting via BB Code Rendering",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-code-rendering"
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      ],
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  "cveMetadata": {
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    "datePublished": "2026-04-01T00:30:12.352Z",
    "dateReserved": "2026-04-01T00:19:59.194Z",
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}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-2CH2-J7QP-PQM3

CVE-2026-35054 (GCVE-0-2026-35054)

Tags

Sightings

Nomenclature