Review reviewCritical

CVE-2021-36582

kooboo cms

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.

CVSS
9.8
EPSS
1.47%
71.2% percentile
CISA KEV
Not listed
Published
2021.09.14
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability1.47%
Technical severityCVSS 9.8

Vulnerability overview

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.

Affected product and versions

Product
kooboo cms
Affected versions
2.1.1.0
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that kooboo cms and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-434
CVE-2021-36582 — kooboo cms | SECUFOCUS NOW