CVE-2023-4157Network attack vector

Stored cross-site scripting via unescaped installation title

Published Aug 4, 2023 · Updated Oct 9, 2024

Stored cross-site scripting in Omeka S before 4.0.3 allows remote authenticated users to execute script via the installation title. Three view templates render the administrator-controlled title without HTML escaping, allowing stored markup to execute when affected pages load. Administrative access is required to save the title, and execution requires another user to view the public landing page or administrative interface.

CVSS severity5.2
Medium
EPSS probability0.51%
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 Omeka S before 4.0.3 allows remote authenticated users to execute script via the installation title. Three view templates render the administrator-controlled title without HTML escaping, allowing stored markup to execute when affected pages load. Administrative access is required to save the title, and execution requires another user to view the public landing page or administrative interface.

The record

CVE
CVE-2023-4157
Published
Aug 4, 2023
Updated
Oct 9, 2024
Vendor
Omeka
Product
Omeka S
Classifications
CWE-74, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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?

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

  1. Affected versionversion=unspecified <4.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Omeka · Omeka Sversion=unspecified <4.0.3
Omeka · Omeka Classicversion=0 <4.0.3

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
5.2huntr.dev CNACVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/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-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059.007JavaScript/JScript

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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