CVE-2023-34192

9.0 CRITICAL 77% exploit odds Drop everything exploited in the wild Fix listed XSS

What it is

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.

At a glance

Exploitability: Can be exploited over the network with a low-privilege account, but needs a user to act. High risk of data exposure, data tampering, service disruption.
In the wild: CISA lists this as exploited in real attacks. Treat as urgent.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2023-05-30 00:00 UTC ReservedThe CVE id was reserved by its CNA
2023-07-06 16:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2025-02-25 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
2025-03-18 Remediation deadlineCISA's due date for federal agencies to fix it
2026-06-17 06:03 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
Exploit odds: 77.3% in the next 30 days (EPSS).
Severity: 9.0 CRITICAL (CVSS).
Fix: a patch or advisory is linked.
It meets the bar for Drop everything: critical, and exploited or very likely to be.

Details

Published: 2023-07-06 16:15 UTC
Last modified: 2026-06-17 06:03 UTC
Added to CISA KEV: 2025-02-25
Exploit probability: 77.3% · EPSS, next 30 days
Weakness: CWE-79 · Cross-site scripting
Record status: Analyzed

Affected

Synacor Zimbra Collaboration Suite 8.8.15

Attack profile CVSS 3.1 · 9.0

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Required
Scope: Changed
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-34192.md and follow it. Check whether this project is affected by CVE-2023-34192. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record