ACTIVELY EXPLOITED
CVE-2022-27926: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
| Vendor | Synacor |
|---|---|
| Product | Zimbra Collaboration Suite (ZCS) |
| Actively exploited | Yes |
| Added to CISA KEV | 3 Apr 2023 |
| CISA federal deadline | 24 Apr 2023 |
| Weakness (CWE) | CWE-138, CWE-79 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability by allowing an endpoint URL to accept parameters without sanitizing.
SOURCES
Other Synacor flaws
- CVE-2026-73570: Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability
- CVE-2025-48700: Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability
- CVE-2025-66376: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability
- CVE-2020-7796: Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability
- CVE-2025-68645: Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.