02 Records
FEED: ACQUIRING
01 RecordSTATE: PUBLISHED
02 Description
CNA: GitHub_MReDoS on endpoint html5client/useragent in BigBlueButton
03 Exploitation and scoring
SRC: CISA, FIRST, NVD, RED HAT- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.- EPSS probability
- 1.52% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Ranks above 72.7% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
SCHEMA: 5.1
- Published
- 2022-06-01 22:20Z4 YR AGO
- Last updated
- 2025-04-23 18:20Z1 YR AGO
- Reserved
- 2022-04-13
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-20Improper Input ValidationClass
- CWE-1333Inefficient Regular Expression ComplexityBase
- Data version
- 5.1
- Document digest
- 771a9ba541eea7247f5b95285a41cc4a9fc24acab345c749a9a10a95a410c93a
05 Affected products
PAIRS: 1VendorProductVersionsPlatforms
bigbluebuttonbigbluebutton>= 2.2, < 2.3.19, >= 2.4.0, < 2.4.7, >= 2.5-alpha-1, < 2.5.0-beta.2—