CVE-2021-36582

9.8 criticalEPSS 1.5%

Critical (9.8) in kooboo kooboo cms. EPSS 1.5% chance of exploitation in the next 30 days.

In Kooboo CMS 2.1.1.0, it is possible to upload a remote shell (e.g., aspx) to the server and then call upon it to receive a reverse shell from the victim server. The files are uploaded to /Content/Template/root/reverse-shell.aspx and can be simply triggered by browsing that URL.

Severity

CVSS 3.1

9.8 critical

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

EPSS: 1.5% chance of exploitation in the next 30 days; higher than 73% of CVEs (scores of 2026-10-31)
CWE: CWE-434
Published: 2021-09-14
Modified: 2026-07-09
Record from: the NVD, synced 2026-10-19

Affected

kooboo:kooboo_cms

References

https://github.com/l00neyhacker/CVE-2021-36582
https://github.com/l00neyhacker/CVE-2021-36582

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