CVE-2025-32788: OctoPrint Authentication Bypass Vulnerability

MODERATE
Advisory Identifier: GHSA-qw93-h6pf-226x
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CVSS 4.3
CWE-290
Published
Advisory Summary

CVE-2025-32788 is a MODERATE (CVSS 4.3) authentication bypass vulnerability (CWE-290: Authentication Bypass by Spoofing) affecting OctoPrint libraries in the PyPI ecosystem. The issue involves octoprint authenticated reverse proxy page authentication bypass. Remediation is available by upgrading affected packages to version 1.11.0.

CVE-2025-32788 at a Glance

CVE Identifier CVE-2025-32788
GHSA Identifier GHSA-qw93-h6pf-226x
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-290: Authentication Bypass by Spoofing
Affected Product OctoPrint
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 4.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Adjacent (AV:A)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2025-32788

To remediate this vulnerability, upgrade all affected OctoPrint dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

OctoPrint fixed: 1.11.0 
pip install OctoPrint>=1.11.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show OctoPrint

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-32788, inspect your installed packages using pip:

pip show OctoPrint

Analyze the terminal output to locate any version of OctoPrint in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.11.0), your application is affected.

Note: The pip show OctoPrint command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-290: Authentication Bypass by Spoofing, where this attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. In OctoPrint, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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](https://github.com/OctoPrint/OctoPrint/blob/d79a0d20f3f1c7f2edb56dedda3b70267a937e65/src/octoprint/server/util/__init__.py): - `require_login` - `require_login_with` - `require_fresh_login_with` By adding the HTTP header `X-Preemptive-Recording: yes` to HTTP requests, these functions allow requests to proceed without redirecting to the login screen, effectively bypassing the login mechanism in the frontend. However, this only grants access to frontend page content, while authenticated API endpoints still enforce proper session validation. ### Credits This vulnerability was discovered and responsibly disclosed to OctoPrint by Jacopo Tediosi

CVE-2025-32788 Affected OctoPrint Versions

1 component(s)
Fixed Versions:
1.11.0
Product / Package Ecosystem Affected Versions Fixed Version
OctoPrint
pypi/OctoPrint
PyPI
< 1.11.0
1.11.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-qw93-h6pf-226x
NVD — CVE-2025-32788 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-32788
Security Fix Commit FIX COMMIT
https://github.com/OctoPrint/OctoPrint/commit/41ff431014edfa18ca1a01897b10463934dc7fc2
OctoPrint Source Repository REPOSITORY
https://github.com/OctoPrint/OctoPrint
OctoPrint Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/octoprint/PYSEC-2025-56.yaml

Frequently Asked Questions

What is CVE-2025-32788?
CVE-2025-32788 is a security vulnerability in OctoPrint involving OctoPrint Authenticated Reverse Proxy Page Authentication Bypass under CWE-290: Authentication Bypass by Spoofing.
Which OctoPrint versions are affected?
Affected versions include releases prior to 1.11.0 across affected packages: OctoPrint.
What version fixes CVE-2025-32788?
Upgrading to 1.11.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is OctoPrint affected?
Yes, OctoPrint is affected in releases prior to 1.11.0. Upgrade your dependency to 1.11.0 or later.
What is the CVSS score of CVE-2025-32788?
CVE-2025-32788 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2025-32788?
CVE-2025-32788 is classified under CWE-290: Authentication Bypass by Spoofing (This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.).
How can I check PyPI dependencies for CVE-2025-32788?
Run the dependency tree command: 'pip show OctoPrint'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qw93-h6pf-226x",
  "modified" : "2025-06-30T12:52:02Z",
  "published" : "2025-04-22T16:49:43Z",
  "aliases" : [ "CVE-2025-32788" ],
  "summary" : "OctoPrint Authenticated Reverse Proxy Page Authentication Bypass",
  "details" : "### Impact\n\nOctoPrint 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. \n\nThe 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. \n\nThe 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.\n\n### Patches\n\nThe vulnerability has been patched in version 1.11.0.\n\n### Details\n\nAn authentication bypass vulnerability exists in the following functions defined in [octoprint/server/util/init.py](https://github.com/OctoPrint/OctoPrint/blob/d79a0d20f3f1c7f2edb56dedda3b70267a937e65/src/octoprint/server/util/__init__.py):\n\n- `require_login`\n- `require_login_with`\n- `require_fresh_login_with`\n\nBy adding the HTTP header `X-Preemptive-Recording: yes` to HTTP requests, these functions allow requests to proceed without redirecting to the login screen, effectively bypassing the login mechanism in the frontend. However, this only grants access to frontend page content, while authenticated API endpoints still enforce proper session validation.\n\n### Credits\n\nThis vulnerability was discovered and responsibly disclosed to OctoPrint by Jacopo Tediosi",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "OctoPrint"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.11.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.10.3"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-qw93-h6pf-226x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-32788"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/OctoPrint/OctoPrint/commit/41ff431014edfa18ca1a01897b10463934dc7fc2"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/OctoPrint/OctoPrint"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/octoprint/PYSEC-2025-56.yaml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-290" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-04-22T16:49:43Z",
    "nvd_published_at" : "2025-04-22T18:15:59Z"
  }
}