CVE-2023-50808Network attack vector

Browser script execution via undisclosed DOM injection

Published Feb 13, 2024 · Updated Aug 19, 2024

DOM-based cross-site scripting in the Modern UI of Zimbra Collaboration before Kepler 9.0.0 Patch 38 allows remote attackers to execute JavaScript. The vendor has not published the DOM source, JavaScript sink, or request path that carries the untrusted value. Exploitation requires a user to interact with attacker-controlled content, and injected script runs in the browser's Zimbra session.

CVSS severity6.1
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

DOM-based cross-site scripting in the Modern UI of Zimbra Collaboration before Kepler 9.0.0 Patch 38 allows remote attackers to execute JavaScript. The vendor has not published the DOM source, JavaScript sink, or request path that carries the untrusted value. Exploitation requires a user to interact with attacker-controlled content, and injected script runs in the browser's Zimbra session.

The record

CVE
CVE-2023-50808
Published
Feb 13, 2024
Updated
Aug 19, 2024
Vendor
Synacor
Product
Zimbra Collaboration Suite
Classifications
CWE-94, CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <9.0.0patch38

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Synacor · Zimbra Collaboration Suiteversion=0 <9.0.0patch38

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo