{"id":"CVE-2026-6397","state":"PUBLISHED","title":"Sticky <= 2.5.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'readmoretext' Shortcode Attribute","description":"The Sticky plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `cvmh-sticky` shortcode `readmoretext` attribute in versions up to and including 2.5.6. This is due to insufficient input sanitization and output escaping in the `cvmh_sticky_front_render()` function — the `readmoretext` attribute value is passed through `apply_filters()` and directly concatenated into the HTML output without any escaping function such as `esc_html()`. 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 a page containing the injected shortcode.","publishedAt":"2026-05-20T01:25:46.486Z","updatedAt":"2026-05-20T17:18:35.975Z","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":["cvmh Sticky"],"affected":[{"vendor":"cvmh","product":"Sticky","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.5.6","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/135783c5-8175-4775-a013-f1e2bef04479?source=cve","https://plugins.trac.wordpress.org/browser/sticky/trunk/includes/functions.php#L118","https://plugins.trac.wordpress.org/browser/sticky/tags/2.5.6/includes/functions.php#L118","https://plugins.trac.wordpress.org/browser/sticky/trunk/includes/shortcode.php#L7","https://plugins.trac.wordpress.org/browser/sticky/tags/2.5.6/includes/shortcode.php#L7"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/6xxx/CVE-2026-6397.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-6397","state":"PUBLISHED","datePublished":"2026-05-20T01:25:46.486Z","dateUpdated":"2026-05-20T17:18:35.975Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-04-15T20:19:43.983Z"},"containers":{"cna":{"title":"Sticky <= 2.5.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'readmoretext' Shortcode Attribute","descriptions":[{"lang":"en","value":"The Sticky plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `cvmh-sticky` shortcode `readmoretext` attribute in versions up to and including 2.5.6. This is due to insufficient input sanitization and output escaping in the `cvmh_sticky_front_render()` function — the `readmoretext` attribute value is passed through `apply_filters()` and directly concatenated into the HTML output without any escaping function such as `esc_html()`. 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 a page containing the injected shortcode."}],"affected":[{"vendor":"cvmh","product":"Sticky","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.5.6","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/135783c5-8175-4775-a013-f1e2bef04479?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/sticky/trunk/includes/functions.php#L118"},{"url":"https://plugins.trac.wordpress.org/browser/sticky/tags/2.5.6/includes/functions.php#L118"},{"url":"https://plugins.trac.wordpress.org/browser/sticky/trunk/includes/shortcode.php#L7"},{"url":"https://plugins.trac.wordpress.org/browser/sticky/tags/2.5.6/includes/shortcode.php#L7"}],"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":"2026-05-20T01:25:46.486Z"},"credits":[{"lang":"en","type":"finder","value":"Djaidja Moundjid"}],"timeline":[{"time":"2026-05-19T12:04:07.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-20T17:18:25.618732Z","id":"CVE-2026-6397","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-20T17:18:35.975Z"}}]}}}