{"id":"CVE-2021-34644","aliases":["EUVD-2021-21294","GHSA-8vg8-h2xx-w3r2"],"status":"published","title":"Multiplayer Games \u003c= 3.7 Reflected Cross-Site Scripting","description":"The Multiplayer Games WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/multiplayergames.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 3.7.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00938,"percentile":0.61191,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-08-16T18:22:21Z","modified":"2026-06-17T03:56:17Z","products":[{"vendor":"multiplayer games","product":"multiplayer games"},{"vendor":"multiplayer-plugin_project","product":"multiplayer-plugin"}],"references":[{"url":"https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34644","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://plugins.trac.wordpress.org/browser/multiplayer-plugin/trunk/multiplayergames.php#L662","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34644"},{"url":"https://github.com/advisories/GHSA-8vg8-h2xx-w3r2"}],"sources":{"cve":[{"id":"CVE-2021-34644","title":"Multiplayer Games \u003c= 3.7 Reflected Cross-Site Scripting","description":"The Multiplayer Games WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/multiplayergames.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 3.7.","status":"published","published":"2021-08-16T18:22:21.137Z","modified":"2025-05-05T18:49:48.538Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:11.59359Z"}],"euvd":[{"id":"EUVD-2021-21294","description":"The Multiplayer Games WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/multiplayergames.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 3.7.","status":"published","published":"2021-08-16T18:22:21Z","modified":"2025-05-05T18:49:48Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T20:32:55.242615Z"}],"ghsa":[{"id":"GHSA-8vg8-h2xx-w3r2","title":"The Multiplayer Games WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the...","description":"The Multiplayer Games WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/multiplayergames.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 3.7.","status":"published","published":"2022-05-24T19:11:13Z","modified":"2023-01-30T05:01:32Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:25.989719Z"}],"nvd":[{"id":"CVE-2021-34644","description":"The Multiplayer Games WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/multiplayergames.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 3.7.","status":"published","published":"2021-08-16T19:15:14.553Z","modified":"2026-06-17T03:56:17.463Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:56.943671Z"}]}}