Critical XSS Vulnerability in Zimbra May Allow Malicious Code to Run in a User Session

Colleagues, I’d like to draw your attention to a cybersecurity update: Zimbra has released a patch to address a critical vulnerability in the Classic Web Client.

This is a stored XSS issue: a specially crafted email can trigger malicious script execution when opened.

If the attack succeeds, an attacker may gain access to mailbox data, the user session, and account settings.

Zimbra recommends upgrading to Collaboration Suite 10.1.19.

Why this matters: XSS in an email client often becomes an entry point for credential theft and session hijacking.

Have you already checked your Zimbra installations?
#cybersecurity #Zimbra #XSS #Vulnerability