CVE-2024-50599Network attack vector

Browser script execution via reflected calendar input

Published Nov 7, 2024 · Updated Nov 8, 2024

Reflected XSS in Zimbra Collaboration Suite 8.8.15 allows remote attackers to execute script in a user's browser via a calendar endpoint. The webmail calendar endpoint places improperly handled user-supplied input into its HTML response, allowing the browser to interpret the reflected content as code. Exploitation requires user interaction, and successful script runs in the affected site's browser context with access bounded by that user's session.

CVSS severity6.1
Medium
EPSS probability60.65%
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 Suite 8.8.15 allows remote attackers to execute script in a user's browser via a calendar endpoint. The webmail calendar endpoint places improperly handled user-supplied input into its HTML response, allowing the browser to interpret the reflected content as code. Exploitation requires user interaction, and successful script runs in the affected site's browser context with access bounded by that user's session.

The record

CVE
CVE-2024-50599
Published
Nov 7, 2024
Updated
Nov 8, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 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

6.1CISA ADP VulnrichmentCVSS: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.

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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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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