VulnerabilityModified
CVE-2021-3311
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.
CRITICAL 9.8EPSS 2.90%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.90%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.90% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-613
- Affected
- octobercms/october
- Source
- cve@mitre.org
References
- https://anisiosantos.me/october-cms-token-reactivationExploit, Third Party Advisory
- https://github.com/octobercms/library/commit/642f597489e6f644d4bd9a0c267e864cabead024Patch, Third Party Advisory
- https://octobercms.com/forum/chan/announcementsVendor Advisory
- https://anisiosantos.me/october-cms-token-reactivationExploit, Third Party Advisory
- https://github.com/octobercms/library/commit/642f597489e6f644d4bd9a0c267e864cabead024Patch, Third Party Advisory
- https://octobercms.com/forum/chan/announcementsVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.