UpHeron
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Servers and applications

CVE-2021-3311

Session ID not invalidated after logout

Severity
Critical 9.8
Published
5 Feb 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.0.472
Also known as
GHSA-7ggw-h8pp-r95r
Sources
NVD, Project advisories (GitHub)

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 software

SoftwareAffected versions
October CMSServers and applications · cpe:a:octobercms:october
  • Every version up to 1.0.471
October CMSServers and applications · github:octobercms/october
  • Every version before 1.0.472

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-3311
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-3311
  • GitHub Advisory Database https://github.com/advisories/GHSA-7ggw-h8pp-r95r
  • github.com https://github.com/octobercms/october/security/advisories/GHSA-7ggw-h8pp-r95r