CVE-2025-48879

MEDIUM EPSS 12.8%
Published Jun 10, 20251y ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Medium
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Published Jun 10, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

OctoPrint versions up until and including 1.11.1 contain a vulnerability that allows any unauthenticated attacker to send a manipulated broken multipart/form-data request to OctoPrint and through that make the web server component become unresponsive. The issue can be triggered by a broken multipart/form-data request lacking an end boundary to any of OctoPrint's endpoints implemented through the octoprint.server.util.tornado.UploadStorageFallbackHandler request handler. The request handler will get stuck in an endless busy loop, looking for a part of the request that will never come. As Tornado is single-threaded, that will effectively block the whole web server. The vulnerability has been patched in version 1.11.2.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Adjacent
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
12.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-140
CWE-835

Affected Products 1

VendorProductVersionRange
octoprintoctoprint* <1.11.2

References 2

  • github.com https://github.com/OctoPrint/OctoPrint/commit/c9c35c17bd820f19c6b12e6c0359fc0cfdd0c1ec
    Patch
  • github.com https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-9wj4-8h85-pgrw
    MitigationVendor Advisory

Remediation

  • github.com https://github.com/OctoPrint/OctoPrint/commit/c9c35c17bd820f19c6b12e6c0359fc0cfdd0c1ec
    Patch