UpHeron
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Servers and applications

CVE-2023-34192

Cross Site Scripting vulnerability in Zimbra ZCS v.8.8.15 allows a remote authenticated attacker to execute arbitrary code via a crafted script to the /h/autoSaveDraft function.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 25 Feb 2025.

Severity
Critical 9.0
Published
6 Jul 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Zimbra CollaborationServers and applications · cpe:a:synacor:zimbra_collaboration_suite
  • Version 8.8.15-p39
  • Version 8.8.15-p38
  • Version 8.8.15-p37
  • Version 8.8.15-p36
All 41 release lines
  • Version 8.8.15
  • Version 8.8.15-p1
  • Version 8.8.15-p2
  • Version 8.8.15-p3
  • Version 8.8.15-p4
  • Version 8.8.15-p5
  • Version 8.8.15-p6
  • Version 8.8.15-p7
  • Version 8.8.15-p8
  • Version 8.8.15-p9
  • Version 8.8.15-p10
  • Version 8.8.15-p11
  • Version 8.8.15-p12
  • Version 8.8.15-p13
  • Version 8.8.15-p14
  • Version 8.8.15-p15
  • Version 8.8.15-p16
  • Version 8.8.15-p17
  • Version 8.8.15-p18
  • Version 8.8.15-p19
  • Version 8.8.15-p20
  • Version 8.8.15-p21
  • Version 8.8.15-p22
  • Version 8.8.15-p23
  • Version 8.8.15-p24
  • Version 8.8.15-p25
  • Version 8.8.15-p26
  • Version 8.8.15-p27
  • Version 8.8.15-p28
  • Version 8.8.15-p29
  • Version 8.8.15-p30
  • Version 8.8.15-p31
  • Version 8.8.15-p31.1
  • Version 8.8.15-p32
  • Version 8.8.15-p33
  • Version 8.8.15-p34
  • Version 8.8.15-p35
  • Version 8.8.15-p36
  • Version 8.8.15-p37
  • Version 8.8.15-p38
  • Version 8.8.15-p39

Known exploited

CISA name
Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due for US agencies
18 Mar 2025
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-34192
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-34192