CVE-2026-3643Network attack vector

Unauthenticated stored XSS via widget source injection

Published Apr 15, 2026 · Updated Apr 15, 2026

Stored XSS in Accessibly 3.0.3 and earlier allows remote attackers to execute JavaScript in site visitors' browsers via its REST API. Unauthenticated REST requests reach updateWidgetOptions(), which stores an unvalidated widgetSrc URL that enqueueFrontendScripts() loads as a sitewide script. Changing widgetSrc to an attacker-controlled URL causes every front-end page view to load the external script.

CVSS severity7.2
High
EPSS probability0.41%
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 Accessibly 3.0.3 and earlier allows remote attackers to execute JavaScript in site visitors' browsers via its REST API. Unauthenticated REST requests reach updateWidgetOptions(), which stores an unvalidated widgetSrc URL that enqueueFrontendScripts() loads as a sitewide script. Changing widgetSrc to an attacker-controlled URL causes every front-end page view to load the external script.

The record

CVE
CVE-2026-3643
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
On The Map Marketing
Product
Accessibly – WordPress Website Accessibility
Classifications
CWE-79, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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 <=3.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

On The Map Marketing · Accessibly – WordPress Website Accessibilityversion=0 <=3.0.3

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1190Exploit Public-Facing Application

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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