GHSA-g93m-8x6h-g5gv · Severity: high · Ecosystem: maven — Apache ZooKeeper: Authentication bypass with IP-based authentication in Admin Server
When using IPAuthenticationProvider in ZooKeeper Admin Server there is a possibility of Authentication Bypass by Spoofing -- this only impacts IP based authentication implemented in ZooKeeper Admin Server. Default configuration of client's IP address detection in IPAuthenticationProvider, which uses HTTP request headers, is weak and allows an attacker to bypass authentication via spoofing client's IP address in request headers. Default configuration honors X-Forwarded-For HTTP header to read client's IP address. X-Forwarded-For request header is mainly used by proxy servers to identify the client and can be easily spoofed by an attacker pretending that the request comes from a different IP address. Admin Server commands, such as snapshot and restore arbitrarily can be executed on successful exploitation which could potentially lead to information leakage or service availability issues. Users are recommended to upgrade to version 3.9.3, which fixes this issue.
Conclusion & alert: CVE-2024-51504 is rated Moderate Risk (56.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.92%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.06% | 0.92% | +0.87% |
| 2 | 2026-02-20 | 0.04% | 0.06% | +0.01% |
| 3 | 2025-12-16 | — | 0.04% | — |
Full EPSS history (15 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.1 | 3.1 | CRITICAL |
|
3.9 | 5.2 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-g93m-8x6h-g5gv · Severity: high · Ecosystem: maven — Apache ZooKeeper: Authentication bypass with IP-based authentication in Admin Server
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2024-51504 unimportant priority: Debian including 1 source packages (zookeeper), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2024-51504 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2024-51504 |
ubuntu
|
medium | CVE-2024-51504 medium priority: Ubuntu including 1 source packages (zookeeper), 10 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 7, ignored 1, needed 1, released 1. | https://ubuntu.com/security/CVE-2024-51504 |
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/b3qrmpkto5r6989qr61fw9y2x646kqlh | Mailing List Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2024/11/06/5 | Mailing List Third Party Advisory |