{"id":"CVE-2021-24134","aliases":["EUVD-2021-11048","GHSA-5gq5-98jg-gqqf"],"status":"published","title":"Constant Contact Forms \u003c 1.8.8 - Multiple Authenticated Stored XSS","description":"Unvalidated input and lack of output encoding in the Constant Contact Forms WordPress plugin, versions before 1.8.8, lead to multiple Stored Cross-Site Scripting vulnerabilities, which allowed high-privileged user (Editor+) to inject arbitrary JavaScript code or HTML in posts where the malicious form is embed.","severity":{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00654,"percentile":0.51768,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-03-18T14:57:49Z","modified":"2026-06-17T03:39:27Z","products":[{"vendor":"constant contact","product":"constant contact forms"},{"vendor":"constantcontact","product":"constant_contact_forms"},{"vendor":"unknown","product":"constant contact forms"}],"references":[{"url":"https://wpscan.com/vulnerability/8f3cca92-d072-4806-9142-7f1a987f840b","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-24134"},{"url":"https://github.com/advisories/GHSA-5gq5-98jg-gqqf"}],"sources":{"cve":[{"id":"CVE-2021-24134","title":"Constant Contact Forms \u003c 1.8.8 - Multiple Authenticated Stored XSS","description":"Unvalidated input and lack of output encoding in the Constant Contact Forms WordPress plugin, versions before 1.8.8, lead to multiple Stored Cross-Site Scripting vulnerabilities, which allowed high-privileged user (Editor+) to inject arbitrary JavaScript code or HTML in posts where the malicious form is embed.","status":"published","published":"2021-03-18T14:57:49Z","modified":"2024-08-03T19:21:18.263Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:05.331617Z"}],"euvd":[{"id":"EUVD-2021-11048","description":"Unvalidated input and lack of output encoding in the Constant Contact Forms WordPress plugin, versions before 1.8.8, lead to multiple Stored Cross-Site Scripting vulnerabilities, which allowed high-privileged user (Editor+) to inject arbitrary JavaScript code or HTML in posts where the malicious form is embed.","status":"published","published":"2021-03-18T14:57:49Z","modified":"2024-08-03T19:21:18Z","updated_at":"2026-11-03T03:24:59.661237Z"}],"ghsa":[{"id":"GHSA-5gq5-98jg-gqqf","title":"Unvalidated input and lack of output encoding in the Constant Contact Forms WordPress plugin,...","description":"Unvalidated input and lack of output encoding in the Constant Contact Forms WordPress plugin, versions before 1.8.8, lead to multiple Stored Cross-Site Scripting vulnerabilities, which allowed high-privileged user (Editor+) to inject arbitrary JavaScript code or HTML in posts where the malicious form is embed.","status":"published","published":"2022-05-24T17:44:49Z","modified":"2023-01-29T05:06:06Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:45:56.584389Z"}],"nvd":[{"id":"CVE-2021-24134","description":"Unvalidated input and lack of output encoding in the Constant Contact Forms WordPress plugin, versions before 1.8.8, lead to multiple Stored Cross-Site Scripting vulnerabilities, which allowed high-privileged user (Editor+) to inject arbitrary JavaScript code or HTML in posts where the malicious form is embed.","status":"published","published":"2021-03-18T15:15:14.51Z","modified":"2026-06-17T03:39:27.06Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:50.805771Z"}]}}