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TI-2020-18095 Aliases CVE-2020-35591GHSA-fg2g-p9qq-jw38

Pi-hole 5.0, 5.1, and 5.1.1 allows Session Fixation.

Priority LOW 27CWE-384Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-384.

Summary

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.

Why it matters now

EPSS 0.0114 66th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:pi-hole:pi-hole:5.0:*:*:*:*:*:*:*5.0VulnerablePi-hole
cpe:2.3:a:pi-hole:pi-hole:5.1:*:*:*:*:*:*:*5.1VulnerablePi-hole
cpe:2.3:a:pi-hole:pi-hole:5.1.1:*:*:*:*:*:*:*5.1.1VulnerablePi-hole
  • cpe:2.3:a:pi-hole:pi-hole:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Pi-hole
  • cpe:2.3:a:pi-hole:pi-hole:5.1:*:*:*:*:*:*:* Versions 5.1 Vulnerable ·Pi-hole
  • cpe:2.3:a:pi-hole:pi-hole:5.1.1:*:*:*:*:*:*:* Versions 5.1.1 Vulnerable ·Pi-hole

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-35591
  2. 2026-10-03 Alias added: GHSA-fg2g-p9qq-jw38

References

Exploit 1

Advisory 1

  • TI-2020-07073 Pi-hole Web v4.3.2 (aka AdminLTE) allows Remote Code Execution by privileged dashboard… KEVCVSS 3.1HIGH 7.2
  • TI-2020-08981 The Gravity updater in Pi-hole through 4.4 allows an authenticated adversary to upload… CVSS 3.1HIGH 8.8
  • TI-2026-36901 Pi-hole: Local privilege escalation from `pihole` user to root via `/etc/pihole/logrotate` CVSS 3.1HIGH 8.8
  • TI-2024-22701 Pi-hole Blind Server-Side Request Forgery (SSRF) vulnerability can lead to Remote Code Execution (RCE) CVSS 3.1HIGH 8.8
  • TI-2021-12374 (Authenticated) Remote Code Execution Possible in Web Interface 5.5 CVSS 3.1HIGH 8.8
  • TI-2024-18806 Pihole Authenticated Arbitrary File Read with root privileges CVSS 3.1HIGH 7.6
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences