{"id":"CVE-2026-3643","state":"PUBLISHED","title":"Accessibly <= 3.0.3 - Missing Authorization to Unauthenticated Stored Cross-Site Scripting via Widget Source Injection via REST API","description":"The Accessibly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in all versions up to, and including, 3.0.3. The plugin registers REST API endpoints at `/otm-ac/v1/update-widget-options` and `/otm-ac/v1/update-app-config` with the `permission_callback` set to `__return_true`, which means no authentication or authorization check is performed. The `updateWidgetOptions()` function in `AdminApi.php` accepts user-supplied JSON data and passes it directly to `AccessiblyOptions::updateAppConfig()`, which saves it to the WordPress options table via `update_option()` without any sanitization or validation. The stored `widgetSrc` value is later retrieved by `AssetsManager::enqueueFrontendScripts()` and passed directly to `wp_enqueue_script()` as the script URL, causing it to be rendered as a `<script>` tag on every front-end page. This makes it possible for unauthenticated attackers to inject arbitrary JavaScript that executes for all site visitors by changing the `widgetSrc` option to point to a malicious external script.","publishedAt":"2026-04-15T08:28:17.565Z","updatedAt":"2026-04-15T16:13:04.206Z","severity":{"score":7.2,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","source":"Wordfence"},"assigner":"Wordfence","products":["onthemapmarketing Accessibly – WordPress Website Accessibility"],"affected":[{"vendor":"onthemapmarketing","product":"Accessibly – WordPress Website Accessibility","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.0.3","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/f8234ea2-ff80-425f-b83d-29c422b40c6a?source=cve","https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/Api/BaseApiController.php#L22","https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/Api/BaseApiController.php#L22","https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/admin/AdminApi.php#L65","https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/admin/AdminApi.php#L65","https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/Data/AccessiblyOptions.php#L69","https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/Data/AccessiblyOptions.php#L69","https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/AssetsManager.php#L63","https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/AssetsManager.php#L63"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:11:50.837Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/3xxx/CVE-2026-3643.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-3643","state":"PUBLISHED","datePublished":"2026-04-15T08:28:17.565Z","dateUpdated":"2026-04-15T16:13:04.206Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-03-06T16:08:09.871Z"},"containers":{"cna":{"title":"Accessibly <= 3.0.3 - Missing Authorization to Unauthenticated Stored Cross-Site Scripting via Widget Source Injection via REST API","descriptions":[{"lang":"en","value":"The Accessibly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in all versions up to, and including, 3.0.3. The plugin registers REST API endpoints at `/otm-ac/v1/update-widget-options` and `/otm-ac/v1/update-app-config` with the `permission_callback` set to `__return_true`, which means no authentication or authorization check is performed. The `updateWidgetOptions()` function in `AdminApi.php` accepts user-supplied JSON data and passes it directly to `AccessiblyOptions::updateAppConfig()`, which saves it to the WordPress options table via `update_option()` without any sanitization or validation. The stored `widgetSrc` value is later retrieved by `AssetsManager::enqueueFrontendScripts()` and passed directly to `wp_enqueue_script()` as the script URL, causing it to be rendered as a `<script>` tag on every front-end page. This makes it possible for unauthenticated attackers to inject arbitrary JavaScript that executes for all site visitors by changing the `widgetSrc` option to point to a malicious external script."}],"affected":[{"vendor":"onthemapmarketing","product":"Accessibly – WordPress Website Accessibility","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.0.3","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/f8234ea2-ff80-425f-b83d-29c422b40c6a?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/Api/BaseApiController.php#L22"},{"url":"https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/Api/BaseApiController.php#L22"},{"url":"https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/admin/AdminApi.php#L65"},{"url":"https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/admin/AdminApi.php#L65"},{"url":"https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/Data/AccessiblyOptions.php#L69"},{"url":"https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/Data/AccessiblyOptions.php#L69"},{"url":"https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/AssetsManager.php#L63"},{"url":"https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/AssetsManager.php#L63"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","baseScore":7.2,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-04-15T08:28:17.565Z"},"credits":[{"lang":"en","type":"finder","value":"Yoschanin Pulsirivong"},{"lang":"en","type":"finder","value":"Ronnachai Sretawat Na Ayutaya"},{"lang":"en","type":"finder","value":"Ronnachai Chaipha"}],"timeline":[{"time":"2026-04-14T19:47:46.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-15T13:31:59.213067Z","id":"CVE-2026-3643","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-15T16:13:04.206Z"}}]}}}