CVE-2025-3056Network attack vector

Stored XSS via insufficient SVG validation

Published Apr 18, 2025 · Updated Apr 8, 2026

Stored XSS in Download Manager 3.3.12 and earlier allows remote authenticated users to inject scripts through uploaded SVG files. The SVG upload path accepts files without sufficient file-type validation, and later delivery renders attacker-controlled SVG script content without safe sanitization or escaping. Author-level access is required to upload the file, and script execution occurs when another user opens the stored SVG.

CVSS severity5.4
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 Download Manager 3.3.12 and earlier allows remote authenticated users to inject scripts through uploaded SVG files. The SVG upload path accepts files without sufficient file-type validation, and later delivery renders attacker-controlled SVG script content without safe sanitization or escaping. Author-level access is required to upload the file, and script execution occurs when another user opens the stored SVG.

The record

CVE
CVE-2025-3056
Published
Apr 18, 2025
Updated
Apr 8, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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

5.4WordfenceCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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