{"cve":"CVE-2021-43633","nvd":{"published":"2022-04-14T13:15:11.580","modified":"2026-06-17T04:11:13.113","status":"Modified","description":"Sourcecodester Messaging Web Application 1.0 is vulnerable to stored XSS. If a sender inserts valid scripts into the chat, the script will be executed on the receiver chat.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4},"cwes":["CWE-79"],"references":["https://medium.com/%40shaunwhorton/how-i-found-two-different-xss-vulnerabilities-a491144e8494","https://www.sourcecodester.com/php/14996/messaging-web-application-phpoop-free-source-code.html","https://medium.com/%40shaunwhorton/how-i-found-two-different-xss-vulnerabilities-a491144e8494","https://www.sourcecodester.com/php/14996/messaging-web-application-phpoop-free-source-code.html"],"products":["messaging_web_application_project:messaging_web_application"],"source":"nvd","synced_at":"2026-10-19T21:30:03.577988018+00:00"},"epss":{"cve":"CVE-2021-43633","score":0.00571,"percentile":0.47275,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}