Authentication Bypass by Spoofing in OctoPrint - CVE-2025-32788
Published: April 22, 2025 / Updated: November 9, 2026
Vulnerability identifier: #VU162903
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-32788
CWE-ID: CWE-290
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated adjacent-network attacker to disclose the IP addresses of configured reverse proxies in OctoPrint.
The vulnerability exists due to frontend authentication checks skipping the login redirect when requests include the X-Preemptive-Recording: yes HTTP header. An unauthenticated adjacent-network attacker can send this header to the authenticated reverse proxy test page and read its rendered HTML without logging in.
Affected software
OctoPrint
How to mitigate CVE-2025-32788
Install security update from vendor's website.
OctoPrint - update to 1.11.0