{"id":"CVE-2026-3220","aliases":["EUVD-2026-30736","GHSA-3jpv-pgxw-p274"],"status":"published","title":"Multiple Plugins - Unauthenticated Stored XSS via Minify Library","description":"The Autoptimize WordPress plugin before 3.1.15, Clearfy Cache  WordPress plugin before 2.4.2, Speed Optimizer  WordPress plugin before 7.7.9 are vulnerable to unauthenticated Stored Cross-Site Scripting (XSS) due to a predictable replacement hash used during the HTML minification process and abusing a regular expression. This allows an attacker to inject arbitrary HTML attributes in the final HTML output by anticipating the placeholder format.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.0032,"percentile":0.25371,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-05-18T06:00:08Z","modified":"2026-06-17T10:43:14Z","products":[{"vendor":"creative motion","product":"clearfy cache"},{"vendor":"optimizingmatters","product":"autoptimize"},{"vendor":"siteground","product":"speed optimizer"},{"vendor":"unknown","product":"autoptimize"},{"vendor":"unknown","product":"clearfy cache"},{"vendor":"unknown","product":"speed optimizer"}],"references":[{"url":"https://wpscan.com/vulnerability/3ceabf11-23cd-4c38-ba14-014348b0ff2d/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3220"},{"url":"https://wpscan.com/vulnerability/3ceabf11-23cd-4c38-ba14-014348b0ff2d"},{"url":"https://github.com/advisories/GHSA-3jpv-pgxw-p274"}],"sources":{"cve":[{"id":"CVE-2026-3220","title":"Multiple Plugins - Unauthenticated Stored XSS via Minify Library","description":"The Autoptimize WordPress plugin before 3.1.15, Clearfy Cache  WordPress plugin before 2.4.2, Speed Optimizer  WordPress plugin before 7.7.9 are vulnerable to unauthenticated Stored Cross-Site Scripting (XSS) due to a predictable replacement hash used during the HTML minification process and abusing a regular expression. This allows an attacker to inject arbitrary HTML attributes in the final HTML output by anticipating the placeholder format.","status":"published","published":"2026-05-18T06:00:08.13Z","modified":"2026-05-18T13:40:11.175Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:49:09.229322Z"}],"euvd":[{"id":"EUVD-2026-30736","description":"The Autoptimize WordPress plugin before 3.1.15, Clearfy Cache  WordPress plugin before 2.4.2, Speed Optimizer  WordPress plugin before 7.7.9 are vulnerable to unauthenticated Stored Cross-Site Scripting (XSS) due to a predictable replacement hash used during the HTML minification process and abusing a regular expression. This allows an attacker to inject arbitrary HTML attributes in the final HTML output by anticipating the placeholder format.","status":"published","published":"2026-05-18T06:00:08Z","modified":"2026-05-18T13:40:11Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:21:16.642345Z"}],"ghsa":[{"id":"GHSA-3jpv-pgxw-p274","title":"The Autoptimize WordPress plugin before 3.1.15, Clearfy Cache  WordPress plugin before 2.4.2,...","description":"The Autoptimize WordPress plugin before 3.1.15, Clearfy Cache  WordPress plugin before 2.4.2, Speed Optimizer  WordPress plugin before 7.7.9 are vulnerable to unauthenticated Stored Cross-Site Scripting (XSS) due to a predictable replacement hash used during the HTML minification process and abusing a regular expression. This allows an attacker to inject arbitrary HTML attributes in the final HTML output by anticipating the placeholder format.","status":"published","published":"2026-05-18T09:31:47Z","modified":"2026-05-18T15:30:37Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:08:11.468783Z"}],"nvd":[{"id":"CVE-2026-3220","description":"The Autoptimize WordPress plugin before 3.1.15, Clearfy Cache  WordPress plugin before 2.4.2, Speed Optimizer  WordPress plugin before 7.7.9 are vulnerable to unauthenticated Stored Cross-Site Scripting (XSS) due to a predictable replacement hash used during the HTML minification process and abusing a regular expression. This allows an attacker to inject arbitrary HTML attributes in the final HTML output by anticipating the placeholder format.","status":"published","published":"2026-05-18T07:16:12.27Z","modified":"2026-06-17T10:43:14.35Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:19.39893Z"}]}}