CVE-2021-44159
CVE-2021-44159 is a critical-severity vulnerability in 4mosan Gcb Doctor 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: 3% (87th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-434
- Affected product: 4mosan Gcb Doctor
- Published:
- Last modified:
Description
4MOSAn GCB Doctor’s file upload function has improper user privilege control. A remote attacker can upload arbitrary files including webshell files without authentication and execute arbitrary code in order to perform arbitrary system operations or deny of service attack.
Frequently asked questions
- What is CVE-2021-44159?
- 4MOSAn GCB Doctor’s file upload function has improper user privilege control. A remote attacker can upload arbitrary files including webshell files without authentication and execute arbitrary code in order to perform arbitrary system operations or deny of service attack.
- How severe is CVE-2021-44159?
- CVE-2021-44159 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-2021-44159 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-44159?
- CVE-2021-44159 affects 4mosan Gcb Doctor. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-44159?
- 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-2021-44159 published?
- CVE-2021-44159 was published on 2021-12-20 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:4mosan:gcb_doctor:*:*:*:*:*:*:*:*
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