CVE-2025-23439Network attack vector

Reflected XSS via unencoded request input

Published Mar 3, 2025 · Updated May 12, 2026

Reflected XSS in Willshouse TinyMCE Extended Config 0.1.0 and earlier allows remote attackers to inject scripts via crafted requests. Published records do not identify the affected request parameter or the code path that returns it without sufficient output encoding. Exploitation requires a privileged user to follow an attacker-controlled link, after which the script runs in the victim browser session.

CVSS severity7.1
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Willshouse TinyMCE Extended Config 0.1.0 and earlier allows remote attackers to inject scripts via crafted requests. Published records do not identify the affected request parameter or the code path that returns it without sufficient output encoding. Exploitation requires a privileged user to follow an attacker-controlled link, after which the script runs in the victim browser session.

The record

CVE
CVE-2025-23439
Published
Mar 3, 2025
Updated
May 12, 2026
Vendor
Willshouse
Product
TinyMCE Extended Config
Classifications
CWE-79, CAPEC-591, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 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 <=0.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Willshouse · TinyMCE Extended Configversion=0 <=0.1.0

Published CVSS scores

7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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