CVE-2024-8673Public exploitNetwork attack vector

Stored XSS via unsanitized SVG upload

Published May 15, 2025 · Updated May 20, 2025

Stored XSS in URBAN BASE Z-Downloads before 1.11.7 allows remote authenticated users to execute JavaScript through uploaded SVG files. The file-upload handler accepts SVG content containing script elements and stores it under a public uploads path without removing executable markup. Administrator-level access is required to upload the SVG, and the script runs only when another user opens the stored file.

CVSS severity9.1
Critical
EPSS probability1.79%
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 URBAN BASE Z-Downloads before 1.11.7 allows remote authenticated users to execute JavaScript through uploaded SVG files. The file-upload handler accepts SVG content containing script elements and stores it under a public uploads path without removing executable markup. Administrator-level access is required to upload the SVG, and the script runs only when another user opens the stored file.

The record

CVE
CVE-2024-8673
Published
May 15, 2025
Updated
May 20, 2025
Vendor
URBAN BASE
Product
Z-Downloads
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 15, 2025CVE publishedPublication date reported by the CVE source.
  2. May 20, 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=0 <1.11.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

URBAN BASE · Z-Downloadsversion=0 <1.11.7

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Cross-Site Scripting (XSS)
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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