CVE-2020-35591

Pi-hole 5.0, 5.1, and 5.1.1 allows Session Fixation. The application does not generate a new session cookie after the user is logged in. A malicious user is able to create a new session cookie value and inject it to a victim. After the victim logs in, the injected cookie becomes valid, giving the attacker access to the user's account through the active session.

• CWE-384

• https://discourse.pi-hole.net/c/announcements/5Release Notes, Vendor Advisory
• https://n4nj0.github.io/advisories/pi-hole-multiple-vulnerabilities-i/Exploit, Third Party Advisory
• https://discourse.pi-hole.net/c/announcements/5Release Notes, Vendor Advisory
• https://n4nj0.github.io/advisories/pi-hole-multiple-vulnerabilities-i/Exploit, Third Party Advisory

Published

Feb 18, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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