CVE-2025-61681Public exploitNetwork attack vector

Stored XSS via unchecked SVG uploads

Published Oct 3, 2025 · Updated Oct 3, 2025

Stored XSS in KUNO CMS 1.3.13 and earlier allows remote attackers to execute JavaScript in visitors' browsers via uploaded SVG files. UploadMedia trusts the request Content-Type without checking file structure or enforcing an extension allowlist, so it stores script-bearing SVG content for web delivery. No account is required to upload the file, but a visitor must open the resulting resource before the script runs in that browser's site context.

CVSS severity5.4
Medium
EPSS probability0.24%
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 KUNO CMS 1.3.13 and earlier allows remote attackers to execute JavaScript in visitors' browsers via uploaded SVG files. UploadMedia trusts the request Content-Type without checking file structure or enforcing an extension allowlist, so it stores script-bearing SVG content for web delivery. No account is required to upload the file, but a visitor must open the resulting resource before the script runs in that browser's site context.

The record

CVE
CVE-2025-61681
Published
Oct 3, 2025
Updated
Oct 3, 2025
Vendor
xuemian168
Product
KUNO CMS
Classifications
CWE-434, CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 3, 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=< 1.3.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

xuemian168 · KUNO CMSversion=< 1.3.14

Published CVSS scores

5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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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