CVE-2025-59689KEV · OVERDUECWE-77

Libraesva Email Security Gateway Command Injection Vulnerability

Medium · published September 19, 2025

Patch now

The score understates this — it's already being exploited

CVSS calls it medium at 6.1. It is confirmed in active exploitation. It sits in the 79.1th percentile for exploit probability.

370
days past CISA
deadline
CVSS v3.1
6.1
EPSS
2%
Percentile
79.1
In the wild
Confirmed
What it is

⚠️ A sneaky command injection lurks in Libraesva ESG, just waiting for the right compressed email attachment to strike! 📧 Think of it as a package arriving at your doorstep, but instead of a nice gift, it's a ticking time bomb that can explode once you open it—if you don't check the contents first! 📦 If exploited, an attacker could leverage this vulnerability to execute arbitrary commands on your server, leading to unauthorized access or data manipulation. This could be absolutely devastating for your organization's security posture.

Put simply

Think of it as a package arriving at your doorstep, but instead of a nice gift, it's a ticking time bomb that can explode once you open it—if you don't check the contents first! 📦 This vulnerability allows attackers to inject malicious commands into the system through compressed email attachments, affecting multiple versions of Libraesva ESG. It’s like bypassing the security checks at the door by slipping in a fake invitation that grants access to restricted areas.

What to do

If exploited, an attacker could leverage this vulnerability to execute arbitrary commands on your server, leading to unauthorized access or data manipulation. This could be absolutely devastating for your organization's security posture. To protect yourself, update to the latest version immediately: 5.0.31, 5.1.20, 5.2.31, 5.4.8, or 5.5.7, depending on your current version. Good practice also includes reviewing your email filtering settings to catch any suspicious attachments. You've got this! Secure your system, and you'll be one step closer to being the hero of your own security story! 🦸‍♂️💪

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.01864 · 79.1th percentile
Weakness
CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')
Published
2025-09-19T00:00Z
KEV added
2025-09-29 · due 2025-10-20
EPSS history
Timeline
  • 29 SEP 00:00Z
    Added to CISA KEV — remediate by Oct 20
    kev
  • 19 SEP 00:00Z
    Libraesva ESG 4.5 through 5.5.x before 5.5.7 allows command injection via a compressed e-mail attachment
    cvelistv5