CVE-2021-37840

HIGHCVSS 8.8/10EPSS 1.66%

Last modified

CVE-2021-37840 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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).. EPSS estimates a 1.66% chance of exploitation in the next 30 days.

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).

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability
1.66%

73.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
AapanelAapanel<= 6.8.12

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-37840?
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).
How severe is CVE-2021-37840?
CVE-2021-37840 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.66% probability of exploitation in the next 30 days.
How do I fix CVE-2021-37840?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-37840?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST