CVE-2023-31544Public exploitNetwork attack vector

Stored XSS via unescaped gallery title

Published May 16, 2023 · Updated Jan 23, 2025

Stored cross-site scripting in Alkacon OpenCMS before 11.0.1 allows remote authenticated users to execute scripts in another user's browser. CmsResultItemWidget.generateTooltipHtml concatenates an uploaded file's Title into gallery tooltip HTML instead of inserting it as text. An Editor can store the payload during file upload, and it runs when another user, including an administrator, loads the file title in folder view.

CVSS severity5.4
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 cross-site scripting in Alkacon OpenCMS before 11.0.1 allows remote authenticated users to execute scripts in another user's browser. CmsResultItemWidget.generateTooltipHtml concatenates an uploaded file's Title into gallery tooltip HTML instead of inserting it as text. An Editor can store the payload during file upload, and it runs when another user, including an administrator, loads the file title in folder view.

The record

CVE
CVE-2023-31544
Published
May 16, 2023
Updated
Jan 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 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?

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

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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