PT-2026-5343 · M-Server · M-Server

Published 2026-01-29 · Updated 2026-02-03 · CVE-2025-63657

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions monkey commit f37e984

Description An out-of-bounds read exists in the mk mimetype find function located in mk server/mk mimetype.c. This issue can be triggered by sending a crafted HTTP request to the server, potentially leading to a Denial of Service (DoS). The vulnerable function is mk mimetype find().

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

AZL-76361

AZL-76392

CVE-2025-63657

Affected Products

M-Server

References · 9

• 🔥 https://github.com/monkey/monkey/issues/426 · Exploit
• 🔥 https://github.com/archersec/security-advisories/blob/master/monkey/monkey-advisory-2025.md · Exploit
• https://osv.dev/vulnerability/AZL-76392 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-63657 · Security Note
• https://osv.dev/vulnerability/AZL-76361 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-63657 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2016983453913231684 · Twitter Post
• https://twitter.com/CVEnew/status/2016970908351496527 · Twitter Post
• https://t.me/cveNotify/150768 · Telegram Post