CVE-2021-3824
CVE-2021-3824 is a medium-severity vulnerability in Openvpn Openvpn Access Server with a CVSS 3.x base score of 6.1. 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-79.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (50th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Openvpn Openvpn Access Server
- Published:
- Last modified:
Description
OpenVPN Access Server 2.9.0 through 2.9.4 allow remote attackers to inject arbitrary web script or HTML via the web login page URL.
Frequently asked questions
- What is CVE-2021-3824?
- OpenVPN Access Server 2.9.0 through 2.9.4 allow remote attackers to inject arbitrary web script or HTML via the web login page URL.
- How severe is CVE-2021-3824?
- CVE-2021-3824 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-3824 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-3824?
- CVE-2021-3824 affects Openvpn Openvpn Access Server. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-3824?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-3824 published?
- CVE-2021-3824 was published on 2021-09-23 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:*
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