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4 vulnerabilities found for Flarum Framework by Flarum
CVE-2026-39924 (GCVE-0-2026-39924)
Vulnerability from nvd – Published: 2026-08-05 14:40 – Updated: 2026-08-05 15:49 X_Open Source
VLAI
EPSS
VEX
Title
Flarum < 1.8.16 Session Persistence via Improper Access Token Revocation
Summary
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 15:48 UTC
CWE
- CWE-613 - Insufficient Session Expiration
Assigner
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
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CVE-2026-39923 (GCVE-0-2026-39923)
Vulnerability from nvd – Published: 2026-08-05 14:38 – Updated: 2026-08-05 19:48 X_Open Source
VLAI
EPSS
VEX
Title
Flarum < 1.8.16 Password Reset Token Expiry Bypass via POST /reset
Summary
Flarum before 1.8.16 contains a password reset token expiry bypass vulnerability that allows unauthenticated attackers to reuse expired password reset tokens by submitting them directly to the reset processing endpoint. The SavePasswordController::handle() method calls PasswordToken::findOrFail() without performing any expiry validation, allowing attackers to bypass the 24-hour token lifetime enforced only during form rendering and change any account's password to gain an authenticated session.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 19:35 UTC
CWE
- CWE-324 - Use of a Key Past its Expiration Date
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/flarum/framework/releases/tag/… | release-notes |
| https://github.com/flarum/framework/pull/4545 | issue-tracking |
| https://github.com/flarum/framework/commit/280305… | patch |
| https://www.vulncheck.com/advisories/flarum-passw… | 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
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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
VLAI
EPSS
VEX
Title
Flarum < 1.8.16 Session Persistence via Improper Access Token Revocation
Summary
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 15:48 UTC
CWE
- CWE-613 - Insufficient Session Expiration
Assigner
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
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CVE-2026-39923 (GCVE-0-2026-39923)
Vulnerability from cvelistv5 – Published: 2026-08-05 14:38 – Updated: 2026-08-05 19:48 X_Open Source
VLAI
EPSS
VEX
Title
Flarum < 1.8.16 Password Reset Token Expiry Bypass via POST /reset
Summary
Flarum before 1.8.16 contains a password reset token expiry bypass vulnerability that allows unauthenticated attackers to reuse expired password reset tokens by submitting them directly to the reset processing endpoint. The SavePasswordController::handle() method calls PasswordToken::findOrFail() without performing any expiry validation, allowing attackers to bypass the 24-hour token lifetime enforced only during form rendering and change any account's password to gain an authenticated session.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 19:35 UTC
CWE
- CWE-324 - Use of a Key Past its Expiration Date
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/flarum/framework/releases/tag/… | release-notes |
| https://github.com/flarum/framework/pull/4545 | issue-tracking |
| https://github.com/flarum/framework/commit/280305… | patch |
| https://www.vulncheck.com/advisories/flarum-passw… | 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
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}
],
"metrics": [
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"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
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"baseScore": 9.2,
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"providerUrgency": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED"
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"value": "GENERAL"
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{
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}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-324",
"description": "Use of a Key Past its Expiration Date",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T14:38:35.604Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"name": "Release Notes",
"tags": [
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"url": "https://github.com/flarum/framework/releases/tag/v1.8.16"
},
{
"name": "Pull Request",
"tags": [
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"url": "https://github.com/flarum/framework/pull/4545"
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{
"name": "Patch Commit",
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},
{
"tags": [
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],
"url": "https://www.vulncheck.com/advisories/flarum-password-reset-token-expiry-bypass-via-post-reset"
}
],
"source": {
"discovery": "UNKNOWN"
},
"tags": [
"x_open-source"
],
"title": "Flarum \u003c 1.8.16 Password Reset Token Expiry Bypass via POST /reset",
"x_generator": {
"engine": "vulncheck"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"cveId": "CVE-2026-39923",
"datePublished": "2026-08-05T14:38:35.604Z",
"dateReserved": "2026-04-07T20:57:06.210Z",
"dateUpdated": "2026-08-05T19:48:08.090Z",
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