CVE-2021-36582
CVE-2021-36582 is a critical-severity vulnerability in Kooboo Kooboo Cms with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- EPSS exploit prediction: 2% (71st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-434
- Affected product: Kooboo Kooboo Cms
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2021-36582?
- 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.
- How severe is CVE-2021-36582?
- CVE-2021-36582 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-36582 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-36582?
- CVE-2021-36582 affects Kooboo Kooboo Cms. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-36582?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-36582 published?
- CVE-2021-36582 was published on 2021-09-14 and last updated on 2026-07-09.
References
Affected products (1)
- cpe:2.3:a:kooboo:kooboo_cms:2.1.1.0:*:*:*:*:*:*:*
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