CVE-2026-42643Network attack vectorHinoki check available

Stored XSS via unescaped image attributes

Published Apr 29, 2026 · Updated Apr 29, 2026

Stored XSS in StellarWP Image Widget 4.4.11 and earlier allows remote authenticated users to inject script through image attributes. The widget editor's imgHTML JavaScript routine concatenates attachment URL, width, height, and alt values into an img element without attribute escaping. A user with high WordPress privileges must save crafted widget data and another user must render it, allowing script to run in the viewer's browser context.

CVSS severity5.9
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in StellarWP Image Widget 4.4.11 and earlier allows remote authenticated users to inject script through image attributes. The widget editor's imgHTML JavaScript routine concatenates attachment URL, width, height, and alt values into an img element without attribute escaping. A user with high WordPress privileges must save crafted widget data and another user must render it, allowing script to run in the viewer's browser context.

The record

CVE
CVE-2026-42643
Published
Apr 29, 2026
Updated
Apr 29, 2026
Vendor
Liquid Web
Product
Image Widget
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 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 <=4.4.11 changes=[{"at":"4.4.12","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Liquid Web · Image Widgetversion=0 <=4.4.11 changes=[{"at":"4.4.12","status":"unaffected"}]

Published CVSS scores

5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/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
T1059.007JavaScript/JScript

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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