CVE-2024-55451Public exploitNetwork attack vector

Token theft via unsanitized SVG event attributes

Published Dec 16, 2024 · Updated Dec 17, 2024

Stored XSS in UJCMS 9.6.3 allows remote authenticated users to execute JavaScript in backend users' browsers via uploaded SVG files. The backend file uploader stores and renders SVG content without removing event attributes such as onload, causing a viewer's browser to run embedded script. Backend access is required to upload the file, and another backend user must view it; exposed non-HttpOnly JWT cookies can then be stolen.

CVSS severity4.8
Medium
EPSS probability0.31%
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 UJCMS 9.6.3 allows remote authenticated users to execute JavaScript in backend users' browsers via uploaded SVG files. The backend file uploader stores and renders SVG content without removing event attributes such as onload, causing a viewer's browser to run embedded script. Backend access is required to upload the file, and another backend user must view it; exposed non-HttpOnly JWT cookies can then be stolen.

The record

CVE
CVE-2024-55451
Published
Dec 16, 2024
Updated
Dec 17, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 17, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8CISA-ADPCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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