CVE-2023-24031Network attack vector

Information disclosure via webmail print-view XSS

Published Jun 15, 2023 · Updated Dec 18, 2024

Reflected XSS in Zimbra Collaboration 8.8.15 and 9.0 allows remote attackers to disclose information through the webmail /h/ endpoint. The Classic Web Client's message and appointment print paths place an untrusted endpoint attribute into generated HTML without sufficient neutralization, allowing arbitrary JavaScript to run in the user's browser. Exploitation requires user interaction with an affected print view and exposes information available to that browser session.

CVSS severity6.1
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Zimbra Collaboration 8.8.15 and 9.0 allows remote attackers to disclose information through the webmail /h/ endpoint. The Classic Web Client's message and appointment print paths place an untrusted endpoint attribute into generated HTML without sufficient neutralization, allowing arbitrary JavaScript to run in the user's browser. Exploitation requires user interaction with an affected print view and exposes information available to that browser session.

The record

CVE
CVE-2023-24031
Published
Jun 15, 2023
Updated
Dec 18, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 18, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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Your stack

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