Risk Letters

Exploited vulnerability

CVE-2023-34192

TLP:CLEAR

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

Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting (XSS) vulnerability that allows a remote authenticated attacker to execute arbitrary code via a crafted script to the /h/autoSaveDraft function.

Facts

  • Vendor: Synacor
  • Product: Zimbra Collaboration Suite (ZCS)
  • CVSS: 9
  • EPSS (probability of exploitation within 30 days): 77.3 %
  • On CISA's Known Exploited Vulnerabilities list since: 25 February 2025
  • First known exploitation: 25 February 2025
  • CISA's deadline for US federal agencies: 18 March 2025
  • Weakness: CWE-79
  • First seen by Risk Letters: 25 February 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD