{"cve":"CVE-2020-25902","nvd":{"published":"2021-03-02T13:15:15.557","modified":"2026-06-17T03:07:26.713","status":"Modified","description":"Blackboard Collaborate Ultra 20.02 is affected by a cross-site scripting (XSS) vulnerability. The XSS payload will execute on the class room, which leads to stealing cookies from users who join the class. NOTE: Third-parties dispute the validity of this entry as a possible false positive during research","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://github.com/Lawyer-1/Turki/blob/main/CVE-2020-25902.md","https://www.blackboard.com/teaching-learning/collaboration-web-conferencing/blackboard-collaborate","https://github.com/Lawyer-1/Turki/blob/main/CVE-2020-25902.md","https://www.blackboard.com/teaching-learning/collaboration-web-conferencing/blackboard-collaborate"],"products":["blackboard:collaborate_ultra"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2020-25902","score":0.00689,"percentile":0.52781,"date":"2026-11-01"},"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."]}