CVE-2025-26844

An issue was discovered in Znuny through 7.1.3

Critical · published May 8, 2025

CVSS v3.1
9.8
EPSS
0%
Percentile
36.3
In the wild
Unconfirmed
What it is

🚨 A cookie set without the HttpOnly flag? That’s like leaving a window wide open in a storm! 🍪💨 Imagine you’ve baked a batch of delicious cookies but forgot to put them in a secure box. An unwelcome guest can simply reach in and grab as many as they want, just like an attacker can snatch sensitive information from those unsecured cookies. If exploited, this vulnerability allows an attacker to easily steal session cookies, potentially hijacking user accounts and gaining unauthorized access to sensitive data. With a CVSS score of 9.8, the stakes are incredibly high—one wrong click can lead to catastrophic data breaches and privacy violations!

Put simply

Imagine you’ve baked a batch of delicious cookies but forgot to put them in a secure box. An unwelcome guest can simply reach in and grab as many as they want, just like an attacker can snatch sensitive information from those unsecured cookies. The issue lies in Znuny versions up to 7.1.3, where cookies are set without the HttpOnly flag, making them accessible via JavaScript. This oversight exposes user sessions to cross-site scripting (XSS) attacks.

What to do

If exploited, this vulnerability allows an attacker to easily steal session cookies, potentially hijacking user accounts and gaining unauthorized access to sensitive data. With a CVSS score of 9.8, the stakes are incredibly high—one wrong click can lead to catastrophic data breaches and privacy violations! Patch Znuny to version 7.1.4 or later immediately to add the HttpOnly flag to your cookies. Additionally, consider auditing your application for other security best practices, like implementing a Content Security Policy (CSP) for added protection. 🛡️ You've got the power to secure your application! Follow these steps and fortify your defenses against cookie theft! 💪✨

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00431 · 36.3th percentile
Published
2025-05-08T00:00Z
EPSS history
Timeline
  • 08 MAY 00:00Z
    An issue was discovered in Znuny through 7.1.3
    cvelistv5