CVE-2021-47801
CVE-2021-47801 is a high-severity vulnerability with a CVSS 3.x base score of 8.2. 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-89.
Key facts
- Severity: High (CVSS 3.x base score 8.2)
- CVSS v4: 8.8
- EPSS exploit prediction: 0% (27th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-3010
- Weakness: CWE-89
- Published:
- Last modified:
Description
Vianeos OctoPUS 5 contains a time-based blind SQL injection vulnerability in the 'login_user' parameter during authentication requests. Attackers can exploit this vulnerability by crafting malicious POST requests with specially constructed SQL payloads that trigger database sleep functions to extract information.
Frequently asked questions
- What is CVE-2021-47801?
- Vianeos OctoPUS 5 contains a time-based blind SQL injection vulnerability in the 'login_user' parameter during authentication requests. Attackers can exploit this vulnerability by crafting malicious POST requests with specially constructed SQL payloads that trigger database sleep functions to extract information.
- How severe is CVE-2021-47801?
- CVE-2021-47801 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
- Is CVE-2021-47801 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2021-47801?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2021-47801 have an EU (EUVD) identifier?
- Yes. CVE-2021-47801 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3010.
- When was CVE-2021-47801 published?
- CVE-2021-47801 was published on 2026-01-16 and last updated on 2026-06-17.
References
- http://www.vianeos.com/en/home-vianeos/
- https://vianeos.com/en/products/octopus
- https://www.exploit-db.com/exploits/50078
- https://www.vulncheck.com/advisories/vianeos-octopus-loginuser-sqli
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