CVE-2025-27915

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A stored cross-site scripting XSS vulnerability exists in the Classic Web Client due to insufficient sanitization of HTML content in ICS files. When a user views an e-mail message containing a malicious ICS entry, its...

CVE-2025-27914

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A Reflected Cross-Site Scripting XSS vulnerability exists in the /h/rest endpoint, allowing authenticated attackers to inject and execute arbitrary JavaScript in a victim's session. Exploitation requires a valid auth token...

Head Mare and Twelve join forces to attack Russian entities

Introduction In September 2024, a series of attacks targeted Russian companies, revealing indicators of compromise and tactics associated with two hacktivist groups: Head Mare and Twelve. Our investigation showed that Head Mare relied heavily on tools previously associated with Twelve...

CVE-2025-27914

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A Reflected Cross-Site Scripting XSS vulnerability exists in the /h/rest endpoint, allowing authenticated attackers to inject and execute arbitrary JavaScript in a victim's session. Exploitation requires a valid auth token...

CVE-2025-27915

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A stored cross-site scripting XSS vulnerability exists in the Classic Web Client due to insufficient sanitization of HTML content in ICS files. When a user views an e-mail message containing a malicious ICS entry, its...

CVE-2025-27914

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A Reflected Cross-Site Scripting XSS vulnerability exists in the /h/rest endpoint, allowing authenticated attackers to inject and execute arbitrary JavaScript in a victim's session. Exploitation requires a valid auth token...

CVE-2025-27914

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A Reflected Cross-Site Scripting XSS vulnerability exists in the /h/rest endpoint, allowing authenticated attackers to inject and execute arbitrary JavaScript in a victim's session. Exploitation requires a valid auth token...

Zimbra Collaboration Server security vulnerabilities

Zimbra Collaboration Server ZCS is an email and collaboration solution from Zimbra. The solution provides email, contacts, calendaring, file sharing, social networking, and other features. A security vulnerability exists in Zimbra Collaboration Server versions 9.0, 10.0, and 10.1, which stems fro...

CVE-2025-27915

Zimbra Collaboration Suite (ZCS) versions 9.0.0 Patch 39 , 10.0.x (prior to 10.0.13 ), and 10.1.x (prior to 10.1.5 ) are vulnerable to a stored cross-site scripting (XSS) vulnerability in the Classic Web Client . The root cause is the insufficient sanitization of HTML content in ICS files . An un...

CVE-2025-27915

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A stored cross-site scripting XSS vulnerability exists in the Classic Web Client due to insufficient sanitization of HTML content in ICS files. When a user views an e-mail message containing a malicious ICS entry, its...

CVE-2025-27914

Zimbra Collaboration (ZCS) versions 9.0, 10.0, and 10.1 are vulnerable to a Reflected Cross-Site Scripting (XSS) issue in the /h/rest endpoint. The root cause is the lack of sufficient measures to protect the web page structure during processing, allowing authenticated attackers to inject and exe...

CVE-2025-27914

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A Reflected Cross-Site Scripting XSS vulnerability exists in the /h/rest endpoint, allowing authenticated attackers to inject and execute arbitrary JavaScript in a victim's session. Exploitation requires a valid auth token...

CVE-2025-27915

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A stored cross-site scripting XSS vulnerability exists in the Classic Web Client due to insufficient sanitization of HTML content in ICS files. When a user views an e-mail message containing a malicious ICS entry, its...

CVE-2025-27915

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A stored cross-site scripting XSS vulnerability exists in the Classic Web Client due to insufficient sanitization of HTML content in ICS files. When a user views an e-mail message containing a malicious ICS entry, its...

CVE-2025-27915

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A stored cross-site scripting XSS vulnerability exists in the Classic Web Client due to insufficient sanitization of HTML content in ICS files. When a user views an e-mail message containing a malicious ICS entry, its...

CVE-2025-27914: Improper Neutralization of Input During Web Page Generation

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A Reflected Cross-Site Scripting XSS vulnerability exists in the /h/rest endpoint, allowing authenticated attackers to inject and execute arbitrary JavaScript in a victim's session. Exploitation requires a valid auth token...

CVE-2025-27915: Improper Neutralization of Input During Web Page Generation

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A stored cross-site scripting XSS vulnerability exists in the Classic Web Client due to insufficient sanitization of HTML content in ICS files. When a user views an e-mail message containing a malicious ICS entry, its...

The Combined Cipher Machine

Interesting article--with photos!--of the US/UK "Combined Cipher Machine" from WWII...

Building a High Performance Team in India: Meet Swami Nathan

Swami Nathan has a track record of building new teams from scratch for global companies. Through his experiences, he’s identified what it takes to build not just any team - but a high performing team that drives innovation and growth for business while propelling career trajectories for those who...

Mattermost SQL Injection Vulnerability

Mattermost is an open source collaboration platform from Mattermost, Inc. in the United States. Mattermost suffers from a SQL injection vulnerability that stems from the use of uncompiled statements, which can be exploited by an attacker to retrieve database data via a specially designed sorting...