Vulnerability-Lookup

GHSA-499P-G3JM-62MP

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

Details

XenForo before 2.3.5 allows OAuth2 client applications to request unauthorized scopes. This affects any customer using OAuth2 clients on any version of XenForo 2.3 prior to 2.3.5, potentially allowing client applications to gain access beyond their intended authorization level.

Severity ?

8.8 (High)


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

8.7 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-71278"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-01T01:16:40Z",
    "severity": "HIGH"
  },
  "details": "XenForo before 2.3.5 allows OAuth2 client applications to request unauthorized scopes. This affects any customer using OAuth2 clients on any version of XenForo 2.3 prior to 2.3.5, potentially allowing client applications to gain access beyond their intended authorization level.",
  "id": "GHSA-499p-g3jm-62mp",
  "modified": "2026-04-01T03:31:40Z",
  "published": "2026-04-01T03:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71278"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/xenforo-oauth2-unauthorized-scope-request"
    },
    {
      "type": "WEB",
      "url": "https://xenforo.com/community/threads/xenforo-2-3-5-includes-security-fix-add-ons-released.228812"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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-2025-71278 (GCVE-0-2025-71278)

Vulnerability from cvelistv5 – Published: 2026-04-01 00:30 – Updated: 2026-04-01 15:52

Title

XenForo OAuth2 Unauthorized Scope Request

Summary

Severity ?

8.7 (High)


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

8.8 (High)


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

CWE

CWE-863 - Incorrect Authorization

Assigner

VulnCheck

References

URL

Tags

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

Impacted products

	Vendor	Product	Version
	XenForo	XenForo	Affected: 2.3.0 , < 2.3.5 (semver)

Date Public ?

2025-01-30 00:00

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-71278",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-01T14:55:30.808142Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
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      }
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          "versions": [
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            }
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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      "datePublic": "2025-01-30T00:00:00.000Z",
      "descriptions": [
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          "value": "XenForo before 2.3.5 allows OAuth2 client applications to request unauthorized scopes. This affects any customer using OAuth2 clients on any version of XenForo 2.3 prior to 2.3.5, potentially allowing client applications to gain access beyond their intended authorization level."
        }
      ],
      "metrics": [
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          "cvssV4_0": {
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "subConfidentialityImpact": "NONE",
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            "vulnAvailabilityImpact": "HIGH",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://xenforo.com/community/threads/xenforo-2-3-5-includes-security-fix-add-ons-released.228812/"
        },
        {
          "name": "VulnCheck Advisory: XenForo OAuth2 Unauthorized Scope Request",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/xenforo-oauth2-unauthorized-scope-request"
        }
      ],
      "title": "XenForo OAuth2 Unauthorized Scope Request",
      "x_generator": {
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  "cveMetadata": {
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Sightings

Author	Source	Type	Date

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-499P-G3JM-62MP

CVE-2025-71278 (GCVE-0-2025-71278)

Tags

Sightings

Nomenclature