CVE-2021-37840 json
aaPanel through 6.8.12 allows Cross-Site WebSocket Hijacking (CSWH) involving OS commands within WebSocket messages at a ws:// URL for /web…
published 2021-08-02 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-24319
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
aaPanel through 6.8.12 allows Cross-Site WebSocket Hijacking (CSWH) involving OS commands within WebSocket messages at a ws:// URL for /webssh (the victim must have configured Terminal with at least one host). Successful exploitation depends on the browser used by a potential victim (e.g., exploitation can occur with Firefox but not Chrome).
Exploit prediction
1.68% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/aaPanel/aaPanel/issues/74 referenced PoC, tagged "exploit" by a source, unverified
- ssd-disclosure.com https://ssd-disclosure.com/ssd-advisory-aapanel-cswh-to-rce/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
References
-
github.com
/aaPanel/aaPanel/issues/74
exploit, third-party-advisory
-
ssd-disclosure.com
/ssd-advisory-aapanel-cswh-to-rce/
exploit, third-party-advisory
Sources
- CVE List CVE-2021-37840
- NVD CVE-2021-37840
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