CVE-2024-23821Network attack vector

Cross-user script execution via unescaped catalog fields

Published Mar 20, 2024 · Updated Apr 10, 2025

Stored XSS in GeoServer before 2.23.4 and 2.24.0 allows remote authenticated users to execute script in another user's browser. GeoWebCache's Demo class inserts catalog-controlled layer, grid-set, format, and parameter strings into GWC Demos Page HTML and JavaScript without context-appropriate encoding. Workspace-level administrator access is required to store a payload, and another user must view an accessible demo page, enabling actions and data access within that user's application privileges.

CVSS severity4.8
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

Stored XSS in GeoServer before 2.23.4 and 2.24.0 allows remote authenticated users to execute script in another user's browser. GeoWebCache's Demo class inserts catalog-controlled layer, grid-set, format, and parameter strings into GWC Demos Page HTML and JavaScript without context-appropriate encoding. Workspace-level administrator access is required to store a payload, and another user must view an accessible demo page, enabling actions and data access within that user's application privileges.

The record

CVE
CVE-2024-23821
Published
Mar 20, 2024
Updated
Apr 10, 2025
Vendor
GeoWebCache
Product
GeoServer
Classifications
CWE-79, T1189
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 2.23.4
  2. Affected versionversion== 2.24.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

GeoWebCache · GeoServerversion=< 2.23.4; version== 2.24.0

Published CVSS scores

4.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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