CVE-2023-42345Public exploitNetwork attack vector

Authenticated script execution via reflected basePath parameter

Published May 8, 2026 · Updated May 8, 2026

Cross-site scripting in Alkacon OpenCms before 16.0 allows remote authenticated users to run script through updateModelGroups.jsp. The JSP reflects the basePath query parameter into its HTML response without neutralizing attribute-breaking markup, so a crafted value becomes executable browser content. An authenticated victim must open the crafted URL; the resulting script runs in that victim's OpenCms origin and can read or modify data available to the session.

CVSS severity6.1
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Alkacon OpenCms before 16.0 allows remote authenticated users to run script through updateModelGroups.jsp. The JSP reflects the basePath query parameter into its HTML response without neutralizing attribute-breaking markup, so a crafted value becomes executable browser content. An authenticated victim must open the crafted URL; the resulting script runs in that victim's OpenCms origin and can read or modify data available to the session.

The record

CVE
CVE-2023-42345
Published
May 8, 2026
Updated
May 8, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 2026Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISA-ADPCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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