CVE-2021-3311
CRITICAL
9.8
CVSS Score
Published: February 5, 2021 at 04:47 AM UTC
Updated: June 17, 2026 at 04:04 AM UTC
1 product affected across 1 vendorOctober
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Severity
CRITICAL9.8
Exploit prediction
EPSS 3%
Description
An issue was discovered in October through build 471. It reactivates an old session ID (which had been invalid after a logout) once a new login occurs. NOTE: this violates the intended Auth/Manager.php authentication behavior but, admittedly, is only relevant if an old session ID is known to an attacker.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
October· Octobercmscomposer
95%v ≤ 1.0.471
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://anisiosantos.me/october-cms-token-reactivationx_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/octobercms/library/commit/642f597489e6f644d4bd9a0c267e864cabead024x_refsource_MISCVendor Advisory
Source: [email protected]
https://octobercms.com/forum/chan/announcementsCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-613
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