High severity8.8NVD Advisory· Published Aug 2, 2021· Updated Jun 17, 2026
CVE-2021-37840
CVE-2021-37840
Description
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).
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- aaPanel/aaPaneldescription
Patches
Vulnerability mechanics
References
2- github.com/aaPanel/aaPanel/issues/74nvdExploitThird Party Advisory
- ssd-disclosure.com/ssd-advisory-aapanel-cswh-to-rce/nvdExploitThird Party Advisory
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