CVE-2021-3824
OpenVPN Access Server 2.9.0 through 2.9.4 allow remote attackers to inject arbitrary web script...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-3824- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-84, CWE-79
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-3824- Weakness
- CWE-84
- Updated
- 2026-11-02
EUVDEUVD-2021-27073 No score
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.
- Record
EUVD-2021-27073- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hqrg-vp62-hmj7 No score
OpenVPN Access Server 2.9.0 through 2.9.4 allow remote attackers to inject arbitrary web script...
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.
- Record
GHSA-hqrg-vp62-hmj7- Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-3824 is a medium vulnerability (CVSS 6.1) in Openvpn Access Server, published September 23, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.75%, the 55th percentile. No source names a fixed version.