CVE-2025-39549Network attack vector

Contributor-level stored script execution

Published Apr 16, 2025 · Updated May 12, 2026

Stored cross-site scripting in WhileTrue Most And Least Read Posts Widget 2.5.20 and earlier allows remote authenticated users to inject scripts. Patchstack has not published the affected parameter, rendering function, or precise failure to sanitize untrusted input before storage and output. Contributor-level access is required, and the stored payload executes only when another user visits affected output, enabling actions within that user’s browser context.

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

Stored cross-site scripting in WhileTrue Most And Least Read Posts Widget 2.5.20 and earlier allows remote authenticated users to inject scripts. Patchstack has not published the affected parameter, rendering function, or precise failure to sanitize untrusted input before storage and output. Contributor-level access is required, and the stored payload executes only when another user visits affected output, enabling actions within that user’s browser context.

The record

CVE
CVE-2025-39549
Published
Apr 16, 2025
Updated
May 12, 2026
Vendor
WhileTrue
Product
Most And Least Read Posts Widget
Classifications
CWE-79, CAPEC-592, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 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 <=2.5.20 changes=[{"at":"2.5.21","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WhileTrue · Most And Least Read Posts Widgetversion=0 <=2.5.20 changes=[{"at":"2.5.21","status":"unaffected"}]

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-592Stored XSS
T1189Drive-by Compromise

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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