Is CVE-2018-6882 actively exploited?

Yes. CVE-2018-6882 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2018-6882 be exploited remotely?

The attack vector of CVE-2018-6882 has not been classified yet.

What is the CVSS score of CVE-2018-6882?

CVE-2018-6882 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2018-6882

HIGHCISA KEVIN THE WILD

CVE-2018-6882

Published: April 19, 2022

EPSS:63.35%probability of exploitation in 30 daysPercentile:98.4th

Official Description

Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that might allow remote attackers to inject arbitrary web script or HTML.

NVD Source

CISA KEV Advisory

Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability

Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that might allow remote attackers to inject arbitrary web script or HTML.

Added to KEV: 2022-04-19Federal patch deadline: 2022-05-10⚠ USED IN RANSOMWARE CAMPAIGNS

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This cross-site scripting (XSS) vulnerability in Synacor Zimbra Collaboration Suite (ZCS) allows remote attackers to inject arbitrary web scripts or HTML. Given its presence in the KEV catalog and a high EPSS score of 0.63352, this vulnerability poses a significant and confirmed risk of exploitation.

Active exploitation of this vulnerability has been observed in the wild. As it's a cross-site scripting flaw, it is remotely exploitable.

Recommended Action

Apply the latest security updates and patches for Synacor Zimbra Collaboration Suite (ZCS). Implement robust input validation and output encoding for web applications to prevent XSS attacks.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2018-6882 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2018-6882 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.