Vulnerability-Lookup

GHSA-4X2H-WCJQ-P974

Vulnerability from github – Published: 2026-08-05 18:31 – Updated: 2026-08-05 18:31

Details

Flarum before 1.8.16 contains an improper session invalidation vulnerability that allows attackers who hold a valid session token to retain full account access after a victim changes their password, because the access_tokens table is never cleared on password change events. The TokensClearer::clearPasswordTokens() function only removes rows from the password_tokens table while leaving all active session cookies and API bearer tokens intact, including long-lived RememberAccessToken entries, and administrator-forced password resets via the user update endpoint are equally ineffective at revoking attacker-held sessions.

Severity

6.8 (Medium)


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

7.6 (High)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-39924"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-613"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-05T16:16:56Z",
    "severity": "HIGH"
  },
  "details": "Flarum before 1.8.16 contains an improper session invalidation vulnerability that allows attackers who hold a valid session token to retain full account access after a victim changes their password, because the access_tokens table is never cleared on password change events. The TokensClearer::clearPasswordTokens() function only removes rows from the password_tokens table while leaving all active session cookies and API bearer tokens intact, including long-lived RememberAccessToken entries, and administrator-forced password resets via the user update endpoint are equally ineffective at revoking attacker-held sessions.",
  "id": "GHSA-4x2h-wcjq-p974",
  "modified": "2026-08-05T18:31:35Z",
  "published": "2026-08-05T18:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39924"
    },
    {
      "type": "WEB",
      "url": "https://github.com/flarum/framework/pull/4546"
    },
    {
      "type": "WEB",
      "url": "https://github.com/flarum/framework/commit/5f080293a029d0d273eb9678d597c74ea86a3bcc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/flarum/framework/releases/tag/v1.8.16"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/flarum-session-persistence-via-improper-access-token-revocation"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/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-2026-39924 (GCVE-0-2026-39924)

Vulnerability from cvelistv5 – Published: 2026-08-05 14:40 – Updated: 2026-08-05 15:49 X_Open Source

Title

Flarum < 1.8.16 Session Persistence via Improper Access Token Revocation

Summary

Severity

7.6 (High)


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

6.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-613 - Insufficient Session Expiration

Assigner

VulnCheck

References

4 references

URL	Tags
https://github.com/flarum/framework/releases/tag/…	release-notes
https://github.com/flarum/framework/pull/4546	issue-tracking
https://github.com/flarum/framework/commit/5f0802…	patch
https://www.vulncheck.com/advisories/flarum-sessi…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Flarum	Flarum Framework	Affected: 0 , < 1.8.16 (semver)

Date Public

2026-04-11 00:00

Credits

Hamed Kohi VulnCheck

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-39924",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-05T15:48:45.636552Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      }
    ],
    "cna": {
      "affected": [
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          "defaultStatus": "affected",
          "packageURL": "pkg:github/flarum/framework",
          "product": "Flarum Framework",
          "repo": "https://github.com/flarum/framework",
          "vendor": "Flarum",
          "versions": [
            {
              "lessThan": "1.8.16",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
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      "credits": [
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          "lang": "en",
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        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
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            "baseSeverity": "HIGH",
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            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
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            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "scenarios": [
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          "descriptions": [
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          "name": "Release Notes",
          "tags": [
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          "url": "https://github.com/flarum/framework/releases/tag/v1.8.16"
        },
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          "name": "Patch Commit",
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        },
        {
          "tags": [
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          "url": "https://www.vulncheck.com/advisories/flarum-session-persistence-via-improper-access-token-revocation"
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      ],
      "source": {
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    "datePublished": "2026-08-05T14:40:27.741Z",
    "dateReserved": "2026-04-07T20:57:06.210Z",
    "dateUpdated": "2026-08-05T15:49:01.036Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

GHSA-4X2H-WCJQ-P974

CVE-2026-39924 (GCVE-0-2026-39924)

Tags

Sightings

Nomenclature