{"apiVersion":"1.0","identifier":"CVE-2026-55491","description":"BigBlueButton is an open-source virtual classroom. Prior to 3.0.29, BigBlueButton failed to escape meetingName in record-and-playback/screenshare/playback/index.html.erb when generating the screenshare playback format. A low-privileged user could store a crafted meeting name that embedded script content, and the script executed in another user-s browser when that user replayed the recording. This issue is fixed in version 3.0.29.","publishedAt":"2026-08-20T22:17:22","lastModifiedAt":"2026-08-21T16:17:19","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55491","cvssScore":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","epssProbability":0.00165,"riskScore":0.55,"affectedProduct":"BigBlueButton","affectedVersions":"<3.0.29","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-55491","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-55491","en":"https://www.redsauce.net/en/cves/CVE-2026-55491","fr":"https://www.redsauce.net/fr/cves/CVE-2026-55491","pt":"https://www.redsauce.net/pt/cves/CVE-2026-55491","de":"https://www.redsauce.net/de/cves/CVE-2026-55491","sk":"https://www.redsauce.net/sk/cves/CVE-2026-55491","el":"https://www.redsauce.net/el/cves/CVE-2026-55491"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-55491"}}