CVE-2025-65318

CRITICAL

Canary Mail <5.1.40 - Info Disclosure

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-65318. PoCs published by bbaboha.

AI-analyzed exploit summary This PoC demonstrates how Canary Mail and Blue Mail fail to apply Mark-of-the-Web tags to saved attachments, allowing attackers to bypass Windows protection mechanisms. It leverages CVE-2017-11882 (Office Equation Editor RCE) to exploit the vulnerability.

Description

When using the attachment interaction functionality, Canary Mail 5.1.40 and below saves documents to a file system without a Mark-of-the-Web tag, which allows attackers to bypass the built-in file protection mechanisms of both Windows OS and third-party software.

Exploits (1)

nomisec WORKING POC 7 stars
by bbaboha · poc
https://github.com/bbaboha/CVE-2025-65318-and-CVE-2025-65319

This PoC demonstrates how Canary Mail and Blue Mail fail to apply Mark-of-the-Web tags to saved attachments, allowing attackers to bypass Windows protection mechanisms. It leverages CVE-2017-11882 (Office Equation Editor RCE) to exploit the vulnerability.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Canary Mail 5.1.40 and below, Blue Mail 1.140.103 and below
No auth needed
Prerequisites: Outdated Microsoft Office Word (16 and below) · Victim interaction to open/save attachment
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5

Scores

CVSS v3 9.1
EPSS 0.0048
EPSS Percentile 37.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-693
Status published
Products (1)
canarymail/canary_mail < 5.1.40
Published Dec 16, 2025
Tracked Since Feb 18, 2026