{"id":"CVE-2021-47950","aliases":["EUVD-2021-34810","GHSA-4x8q-cwhj-47mg"],"status":"published","title":"Advanced Guestbook 2.4.4 Persistent XSS via Smilies","description":"Advanced Guestbook 2.4.4 contains a persistent cross-site scripting vulnerability in the smilies administration interface that allows authenticated attackers to inject malicious scripts by manipulating the s_emotion parameter. Attackers can submit POST requests to admin.php with JavaScript code in the s_emotion field, which executes when administrators view the smilies tab.","severity":{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00187,"percentile":0.08357,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-05-10T12:52:11Z","modified":"2026-07-20T20:10:00Z","products":[{"vendor":"ampps","product":"advanced guestbook"}],"references":[{"url":"https://www.exploit-db.com/exploits/49875","tags":["exploit"]},{"url":"https://www.ampps.com/apps/guestbooks/Advanced_Guestbook","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/advanced-guestbook-persistent-xss-via-smilies","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-47950"},{"url":"https://github.com/advisories/GHSA-4x8q-cwhj-47mg"}],"sources":{"cve":[{"id":"CVE-2021-47950","title":"Advanced Guestbook 2.4.4 Persistent XSS via Smilies","description":"Advanced Guestbook 2.4.4 contains a persistent cross-site scripting vulnerability in the smilies administration interface that allows authenticated attackers to inject malicious scripts by manipulating the s_emotion parameter. Attackers can submit POST requests to admin.php with JavaScript code in the s_emotion field, which executes when administrators view the smilies tab.","status":"published","published":"2026-05-10T12:52:11.604Z","modified":"2026-07-15T01:24:41.033Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:56.308189Z"}],"euvd":[{"id":"EUVD-2021-34810","description":"Advanced Guestbook 2.4.4 contains a persistent cross-site scripting vulnerability in the smilies administration interface that allows authenticated attackers to inject malicious scripts by manipulating the s_emotion parameter. Attackers can submit POST requests to admin.php with JavaScript code in the s_emotion field, which executes when administrators view the smilies tab.","status":"published","published":"2026-05-10T12:52:11Z","modified":"2026-07-15T01:24:41Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:19:54.255702Z"}],"ghsa":[{"id":"GHSA-4x8q-cwhj-47mg","title":"Advanced Guestbook 2.4.4 contains a persistent cross-site scripting vulnerability in the smilies...","description":"Advanced Guestbook 2.4.4 contains a persistent cross-site scripting vulnerability in the smilies administration interface that allows authenticated attackers to inject malicious scripts by manipulating the s_emotion parameter. Attackers can submit POST requests to admin.php with JavaScript code in the s_emotion field, which executes when administrators view the smilies tab.","status":"published","published":"2026-05-10T15:31:20Z","modified":"2026-05-10T15:31:32Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:07:58.760928Z"}],"nvd":[{"id":"CVE-2021-47950","description":"Advanced Guestbook 2.4.4 contains a persistent cross-site scripting vulnerability in the smilies administration interface that allows authenticated attackers to inject malicious scripts by manipulating the s_emotion parameter. Attackers can submit POST requests to admin.php with JavaScript code in the s_emotion field, which executes when administrators view the smilies tab.","status":"published","published":"2026-05-10T13:16:31.587Z","modified":"2026-07-20T20:10:00.11Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:09.005706Z"}]}}