OctoPrint Authenticated Reverse Proxy Page Authentication Bypass

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

4.3 · CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

• CVE-2025-32788: 0.25% estimated exploitation activity in the next 30 days; percentile 15.93 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact OctoPrint versions up until and including 1.10.3 contain a vulnerability that allows an attacker to bypass the login redirect and directly access the rendered HTML of certain frontend pages. The impact on data exposure is minimal because, typically, data is loaded via API requests that correctly enforce user authentication. In the current codebase, cases where data is directly embedded in the page content are rare. However, one notable exception is the authenticated variant of the reverse proxy test page, which displays the IP addresses of configured reverse proxies. The primary risk lies in potential future modifications to the codebase that might incorrectly rely on the vulnerable internal functions for authentication checks, leading to security vulnerabilities. Patches The vulnerability has been patched in version 1.11.0. Details An authentication bypass vulnerability exists in the following functions defined in octoprint/server/util/init.py: - requirelogin -…

Published by the source

22 Apr 2025, 16:49 UTC

Last modified by the source

30 Jun 2025, 13:09 UTC

Source last checked

26 Oct 2026, 13:32 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-qw93-h6pf-226x

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-qw93-h6pf-226x

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# Patch Next advisory brief: CVE-2025-32788

Advisory: OctoPrint Authenticated Reverse Proxy Page Authentication Bypass
IDs: CVE-2025-32788, GHSA-qw93-h6pf-226x
Record: https://patchnext.com/advisories/cve-2025-32788 (revision 2, source checked 26 Oct 2026, 13:32 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: octoprint 1.11.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI octoprint: affected <= 1.10.3; fixed in 1.11.0

## Suggested inspection (read-only)
- `python -m pip show octoprint`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on octoprint.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-qw93-h6pf-226x (OSV record GHSA-qw93-h6pf-226x lists affected ranges: PyPI octoprint >=0 <1.11.0 (fixed))
- Verified: https://github.com/advisories/GHSA-qw93-h6pf-226x (GitHub-reviewed advisory GHSA-qw93-h6pf-226x lists affected ranges: PyPI octoprint >=0 <=1.10.3)

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