CVE-2026-55491
⚪ Do wiadomości
W BigBlueButton przed 3.0.29, brak odpowiedniego zabezpieczenia meetingName umożliwia atak XSS.
CVSS
5.4
EPSS
0.2%
Exploit
none
Vendor
Opis źródłowy (NVD)
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.
brak
Brak patcha
Źródła i daty
| Źródło | Wartość |
|---|---|
| NVD – CVSS | 5.4 |
| CISA KEV (aktywnie wykorzystywane) | Nie |
| FIRST EPSS (prawdopodobieństwo exploita) | 0.2% |
| Opublikowano (NVD) | 2026-08-20 22:17:22 UTC |
| Ostatnia modyfikacja (NVD) | 2026-09-16 13:42:43 UTC |
Referencje
- https://github.com/bigbluebutton/bigbluebutton/commit/a53f2b92022388bfa4109d3136d1f3a932404b1b ([email protected])
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.29 ([email protected])
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-57p5-c888-74f9 ([email protected])