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CVE-2024-45519

Published: Oct 2, 2024Updated: Nov 4, 2025 Sources: CVE List NVD BDUNVD-CWE-noinfo
10.0CRITICAL
NVD MITRE
EPSS Score
99.9%
Top 0.0%
CISA KEV
Active Exploitation
Since Oct 3, 2024
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Nuclei · OpenVAS

Description

The postjournal service in Zimbra Collaboration (ZCS) before 8.8.15 Patch 46, 9 before 9.0.0 Patch 41, 10 before 10.0.9, and 10.1 before 10.1.1 sometimes allows unauthenticated users to execute commands.

In plain language

AI Act now

Zimbra Collaboration (ZCS) has a critical bug in its postjournal service that can let an attacker run commands on the server without logging in. If your business runs ZCS and it’s not updated to the listed fixes, you should treat this as urgent.

Executive summary

CVE-2024-45519 is an unauthenticated command-execution flaw in the Zimbra Collaboration Suite (ZCS) postjournal service; attackers can send a network request that triggers unauthorized system command execution on a vulnerable server.

If affected, business impact
Full server takeoverDisruption of email serviceData theft riskMalware/ransomware risk

What to do now

  1. Check your Zimbra Collaboration Suite version and whether your installation is earlier than 8.8.15 Patch 46, 9.0.0 Patch 41, 10.0.9, or 10.1.1.
  2. Upgrade Zimbra Collaboration Suite to 8.8.15 (Patch 46), 9.0.0 (Patch 41), 10.0.9, or 10.1.1.
  3. If you cannot upgrade immediately, stop exposing the Zimbra postjournal service to the public internet and follow Zimbra’s mitigation guidance for this issue.
  4. Verify the post-upgrade version, then review server logs for any suspicious postjournal-related requests around the timeframe of the vulnerability exposure.
Usually a quick update

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfoCWE-78

Affected Products

synacor
commercial·US
zimbra collaboration suiteOn-premWeb App
Communications / email-server-client
Zimbra Inc.
commercial·US
Zimbra Collaboration SuiteMixed
Communications / email-server-client
and 1 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Oct 3, 2024
Remediation due:Oct 24, 2024

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Official Patch Available
Is your org exposed to CVE-2024-45519?We'll check your whole external perimeter for exposure — free. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://wiki.zimbra.com/wiki/Security_Center
wiki.zimbra.com
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy
wiki.zimbra.com
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.1#Security_Fixes
wiki.zimbra.com
and 7 more references View all →
News mentions
1

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