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Fencer Vulns
high 8.8

CVE-2020-11108 in the critical feed json

The Gravity updater in Pi-hole through 4.4 allows an authenticated adversary to upload arbitrary files.

published 2020-05-11 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-3466

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
78.3%
EPSS 78.3% chance of exploitation in 30 days, percentile 99.5%
public exploits
5
Metasploit, Exploit-DB

Summary

The Gravity updater in Pi-hole through 4.4 allows an authenticated adversary to upload arbitrary files. This can be abused for Remote Code Execution by writing to a PHP file in the web directory. (Also, it can be used in conjunction with the sudo rule for the www-data user to escalate privileges to root.) The code error is in gravity_DownloadBlocklistFromUrl in gravity.sh.

Timeline

  1. First public exploit (Metasploit exploit/unix/http/pihole_blocklist_exec)
  2. Published

Exploit prediction

78.26% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/unix/http/pihole_blocklist_exec Pi-Hole heisenbergCompensator Blocklist OS Command Execution metasploit exploit, excellent rank, 2020-05-10
  • EDB-48519 Pi-hole 4.4.0 - Remote Code Execution (Authenticated) webapps, 2020-05-26
  • EDB-48491 Pi-Hole - heisenbergCompensator Blocklist OS Command Execution (Metasploit) remote, 2020-05-19
  • EDB-48443 Pi-hole < 4.4 - Authenticated Remote Code Execution / Privileges Escalation webapps, 2020-05-10
  • EDB-48442 Pi-hole < 4.4 - Authenticated Remote Code Execution webapps, 2020-05-10
  • frichetten.com https://frichetten.com/blog/cve-2020-11108-pihole-rce/ referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/Frichetten/CVE-2020-11108-PoC referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/157623/Pi-hole-4.4-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/157624/Pi-hole-4.4-Remote-Code-Execution-Privilege-Escalation.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.