CVE-2022-26497 json
BigBlueButton Greenlight 2.11.1 allows XSS.
published 2022-06-02 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-31055
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 58%
- public exploits
- 0
- none known
Summary
BigBlueButton Greenlight 2.11.1 allows XSS. A threat actor could have a username containing a JavaScript payload. The payload gets executed in the browser of the victim in the "Share room access" dialog if the victim has shared access to the particular room with the attacker previously.
Patch / fix
Exploit prediction
0.86% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/bigbluebutton/greenlight/blob/master/app/assets/javascripts/room.js#L352 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
mgm-sp.com
/en/cve-2022-26497-bigbluebutton-greenlight-xss/
patch, third-party-advisory
-
github.com
/bigbluebutton/greenlight/blob/master/app/assets/javascripts/room.js#L352
exploit, third-party-advisory
- packetstormsecurity.com /files/172143/Shannon-Baseband-acfg-pcfg-SDP-Attribute-Memory-Corruption.html
Sources
- CVE List CVE-2022-26497
- NVD CVE-2022-26497
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