Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

CVSS v3.1 Metrics

MEDIUM

6.1 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation Likelihood

EPSS Prediction

87.97 %

Predictive Probability

Percentile Rank

99.5 th

Documented as more likely to be exploited than 99.5% of known CVEs.

Detection Date

Feb 25, 2022

Remediation Due

Mar 11, 2022

CISA Catalog Active

Threat Analysis

Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting (XSS) vulnerability in the Calendar feature that allows an attacker to execute arbitrary code.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2022-24682