CVE-2023-53925Public exploitNetwork attack vector

Stored XSS via unsanitized SVG upload

Published Dec 17, 2025 · Updated Dec 17, 2025

Stored XSS in UliCMS 2023.1 allows attackers to execute JavaScript in another user's browser through an uploaded SVG file. The file-manager endpoint admin/fm/upload.php accepts an image/svg+xml file containing a script and stores it under web-accessible content without removing executable SVG markup. Exploitation requires access to the file-management upload workflow and a user to open the stored SVG; the script then runs in that user's UliCMS origin.

CVSS severity6.1
Medium
EPSS probability0.37%
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 UliCMS 2023.1 allows attackers to execute JavaScript in another user's browser through an uploaded SVG file. The file-manager endpoint admin/fm/upload.php accepts an image/svg+xml file containing a script and stores it under web-accessible content without removing executable SVG markup. Exploitation requires access to the file-management upload workflow and a user to open the stored SVG; the script then runs in that user's UliCMS origin.

The record

CVE
CVE-2023-53925
Published
Dec 17, 2025
Updated
Dec 17, 2025
Vendor
UliCMS
Product
UliCMS
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 17, 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=2023.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

UliCMS · UliCMSversion=2023.1

Published CVSS scores

6.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.1NVDCVSS: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')
T1189Drive-by Compromise

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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