{"id":"CVE-2026-77187","state":"PUBLISHED","title":"My Calendar <= 3.8.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'before' and 'after' Shortcode Attributes","description":"The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'before' and 'after' Shortcode Attributes in all versions up to, and including, 3.8.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.","publishedAt":"2026-09-09T03:28:47.465Z","updatedAt":"2026-09-11T20:19:14.864Z","severity":{"score":6.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","source":"Wordfence"},"assigner":"Wordfence","products":["joedolson My Calendar – Accessible Event Manager"],"affected":[{"vendor":"joedolson","product":"My Calendar – Accessible Event Manager","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.8.3","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/8c8beca2-d02b-4379-99e9-8090ef84ca6d?source=cve","https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar-events.php#L1102","https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar-shortcodes.php#L358","https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar.php#L563","https://github.com/joedolson/my-calendar/commit/89bbf7314fac84cdb89e520e8b7b6d69eee8dd3c"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/77xxx/CVE-2026-77187.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77187","state":"PUBLISHED","datePublished":"2026-09-09T03:28:47.465Z","dateUpdated":"2026-09-11T20:19:14.864Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-08-20T16:37:03.568Z"},"containers":{"cna":{"title":"My Calendar <= 3.8.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'before' and 'after' Shortcode Attributes","descriptions":[{"lang":"en","value":"The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'before' and 'after' Shortcode Attributes in all versions up to, and including, 3.8.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page."}],"affected":[{"vendor":"joedolson","product":"My Calendar – Accessible Event Manager","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.8.3","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/8c8beca2-d02b-4379-99e9-8090ef84ca6d?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar-events.php#L1102"},{"url":"https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar-shortcodes.php#L358"},{"url":"https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar.php#L563"},{"url":"https://github.com/joedolson/my-calendar/commit/89bbf7314fac84cdb89e520e8b7b6d69eee8dd3c"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","baseScore":6.4,"baseSeverity":"MEDIUM"}}],"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":"2026-09-09T03:28:47.465Z"},"credits":[{"lang":"en","type":"finder","value":"Wordfence PRISM"}],"timeline":[{"time":"2026-08-20T16:52:09.000Z","lang":"en","value":"Vendor Notified"},{"time":"2026-09-08T14:29:40.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-77187","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-11T20:10:18.400694Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-11T20:19:14.864Z"}}]}}}