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Product · Synacor

Zimbra Collaboration

2 known vulnerabilities.

Zimbra Collaboration at a glance

Last 12 months
2
Critical · all time
0
Exploited · all time
0
Public exploit · all time
0
New vulnerabilities per month · last 12 months
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Most common weaknesses

All Critical High Medium Low Exploited only Public exploit

2 results · Feed

  • Medium 5.3
    CVE-2026-66912

    Stored Cross-Site Scripting in Zimbra

    Zimbra is vulnerable to Stored Cross-Site Scripting (XSS) via the From email header during HTML reply composition in Classic UI. Due to insufficient sanitization of the From header value, a remote attacker can send a crafted email containing a malicious From …

    Synacor Zimbra Collaboration
  • Medium 5.3
    CVE-2026-66911

    Stored Cross-Site Scripting in Zimbra

    Zimbra is vulnerable to stored cross-site scripting (XSS) via the Content-Location MIME header in email attachments. Due to lack of sanitization of the Content-Location header, an attacker can set it to a javascript: URI. An unauthenticated remote attacker ca…

    Synacor Zimbra Collaboration