CVE-2022-3922Public exploitNetwork attack vector

Stored XSS via unescaped YouTube API key

Published Dec 28, 2022 · Updated Apr 10, 2025

Stored XSS in WPMU DEV Broken Link Checker before 1.11.20 allows remote authenticated users to inject scripts through an admin setting. The YouTube API key setting stores the youtube_api_key parameter without adequate input sanitization and renders it on the settings page without output escaping. Administrator-level access is required, and the script runs when a user revisits the settings page, including on multisite installations that deny unfiltered_html.

CVSS severity4.8
Medium
EPSS probability0.51%
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 WPMU DEV Broken Link Checker before 1.11.20 allows remote authenticated users to inject scripts through an admin setting. The YouTube API key setting stores the youtube_api_key parameter without adequate input sanitization and renders it on the settings page without output escaping. Administrator-level access is required, and the script runs when a user revisits the settings page, including on multisite installations that deny unfiltered_html.

The record

CVE
CVE-2022-3922
Published
Dec 28, 2022
Updated
Apr 10, 2025
Vendor
WPMU DEV
Product
Broken Link Checker
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 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 <1.11.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WPMU DEV · Broken Link Checkerversion=0 <1.11.20

Published CVSS scores

5.5WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/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 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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/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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