CVE-2025-39516Network attack vector

Authenticated browser script execution via undisclosed DOM sink

Published Apr 16, 2025 · Updated Apr 28, 2026

DOM-based XSS in Alan Petersen Author WIP Progress Bar 1.0 and earlier allows remote authenticated users to execute script in a visitor's browser. Patchstack identifies improper neutralization during web-page generation but does not disclose the affected input, function, or DOM source and sink. Exploitation requires low-privileged access and user interaction, and the reported consequence is script execution in the plugin site's browser origin.

CVSS severity6.5
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in Alan Petersen Author WIP Progress Bar 1.0 and earlier allows remote authenticated users to execute script in a visitor's browser. Patchstack identifies improper neutralization during web-page generation but does not disclose the affected input, function, or DOM source and sink. Exploitation requires low-privileged access and user interaction, and the reported consequence is script execution in the plugin site's browser origin.

The record

CVE
CVE-2025-39516
Published
Apr 16, 2025
Updated
Apr 28, 2026
Vendor
Alan Petersen
Product
Author WIP Progress Bar
Classifications
CWE-79, CAPEC-588, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Alan Petersen · Author WIP Progress Barversion=0 <=1.0

Published CVSS scores

6.5PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-588DOM-Based XSS
T1059.007JavaScript

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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