Openvpn Access Server
by OpenVPN
Source repositories
CVEs (22)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2023-46850 | Cri | 0.64 | 9.8 | 0.02 | Nov 11, 2023 | Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer. | ||
| CVE-2020-8953 | Cri | 0.64 | 9.8 | 0.01 | Feb 13, 2020 | OpenVPN Access Server 2.8.x before 2.8.1 allows LDAP authentication bypass (except when a user is enrolled in two-factor authentication). | ||
| CVE-2025-3110 | Hig | 0.49 | 7.5 | 0.00 | Jul 8, 2026 | OpenVPN Access Server 2.7.2 through 3.1.0 accepts bare line-feed sequences inside HTTP header values, allowing remote attackers to perform HTTP request smuggling when deployed behind a reverse proxy | ||
| CVE-2023-46849 | Hig | 0.49 | 7.5 | 0.01 | Nov 11, 2023 | Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service. | ||
| CVE-2021-4234 | Hig | 0.49 | 7.5 | 0.01 | Jul 6, 2022 | OpenVPN Access Server 2.10 and prior versions are susceptible to resending multiple packets in a response to a reset packet sent from the client which the client again does not respond to, resulting in a limited amplification attack. | ||
| CVE-2022-33738 | Hig | 0.49 | 7.5 | 0.01 | Jul 6, 2022 | OpenVPN Access Server before 2.11 uses a weak random generator used to create user session token for the web portal | ||
| CVE-2022-33737 | Hig | 0.49 | 7.5 | 0.01 | Jul 6, 2022 | The OpenVPN Access Server installer creates a log file readable for everyone, which from version 2.10.0 and before 2.11.0 may contain a random generated admin password | ||
| CVE-2020-36382 | Hig | 0.49 | 7.5 | 0.02 | Jun 4, 2021 | OpenVPN Access Server 2.7.3 to 2.8.7 allows remote attackers to trigger an assert during the user authentication phase via incorrect authentication token data in an early phase of the user authentication resulting in a denial of service. | ||
| CVE-2020-15074 | Hig | 0.49 | 7.5 | 0.01 | Jul 14, 2020 | OpenVPN Access Server older than version 2.8.4 and version 2.9.5 generates new user authentication tokens instead of reusing exiting tokens on reconnect making it possible to circumvent the initial token expiry timestamp. | ||
| CVE-2020-11462 | Hig | 0.49 | 7.5 | 0.01 | May 4, 2020 | An issue was discovered in OpenVPN Access Server before 2.7.0 and 2.8.x before 2.8.3. With the full featured RPC2 interface enabled, it is possible to achieve a temporary DoS state of the management interface when sending an XML Entity Expansion (XEE) payload to the XMLRPC based… | ||
| CVE-2025-50055 | Med | 0.42 | 6.4 | 0.00 | Oct 27, 2025 | Cross-site scripting (XSS) vulnerability in the SAML Authentication module in OpenVPN Access Server version 2.14.0 through 2.14.3 allows configured remote SAML Assertion Consumer Service (ACS) endpoint servers to inject arbitrary web script or HTML via the RelayState parameter | ||
| CVE-2021-3824 | Med | 0.40 | 6.1 | 0.01 | Sep 23, 2021 | 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. | ||
| CVE-2017-5868 | Med | 0.40 | 6.1 | 0.05 | May 26, 2017 | CRLF injection vulnerability in the web interface in OpenVPN Access Server 2.1.4 allows remote attackers to inject arbitrary HTTP headers and consequently conduct session fixation attacks and possibly HTTP response splitting attacks via "%0A" characters in the PATH_INFO to… | ||
| CVE-2020-15077 | Med | 0.35 | 5.3 | 0.01 | Jun 4, 2021 | OpenVPN Access Server 2.8.7 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks. | ||
| CVE-2014-8104 | 0.00 | — | 0.03 | Dec 3, 2014 | OpenVPN 2.x before 2.0.11, 2.1.x, 2.2.x before 2.2.3, and 2.3.x before 2.3.6 allows remote authenticated users to cause a denial of service (server crash) via a small control channel packet. | |||
| CVE-2014-9104 | 0.00 | — | 0.01 | Nov 26, 2014 | Multiple cross-site request forgery (CSRF) vulnerabilities in the XML-RPC API in the Desktop Client in OpenVPN Access Server 1.5.6 and earlier allow remote attackers to hijack the authentication of administrators for requests that (1) disconnecting established VPN sessions, (2)… | |||
| CVE-2013-2692 | 0.00 | — | 0.01 | May 13, 2014 | Cross-site request forgery (CSRF) vulnerability in the Admin web interface in OpenVPN Access Server before 1.8.5 allows remote attackers to hijack the authentication of administrators for requests that create administrative users. | |||
| CVE-2013-2061 | 0.00 | — | 0.03 | Nov 18, 2013 | The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on… | |||
| CVE-2006-2229 | 0.00 | — | 0.01 | May 5, 2006 | OpenVPN 2.0.7 and earlier, when configured to use the --management option with an IP that is not 127.0.0.1, uses a cleartext password for TCP sessions to the management interface, which might allow remote attackers to view sensitive information or cause a denial of service. | |||
| CVE-2006-1629 | 0.00 | — | 0.03 | Apr 6, 2006 | OpenVPN 2.0 through 2.0.5 allows remote malicious servers to execute arbitrary code on the client by using setenv with the LD_PRELOAD environment variable. |
- risk 0.64cvss 9.8epss 0.02
Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.
- risk 0.64cvss 9.8epss 0.01
OpenVPN Access Server 2.8.x before 2.8.1 allows LDAP authentication bypass (except when a user is enrolled in two-factor authentication).
- risk 0.49cvss 7.5epss 0.00
OpenVPN Access Server 2.7.2 through 3.1.0 accepts bare line-feed sequences inside HTTP header values, allowing remote attackers to perform HTTP request smuggling when deployed behind a reverse proxy
- risk 0.49cvss 7.5epss 0.01
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.
- risk 0.49cvss 7.5epss 0.01
OpenVPN Access Server 2.10 and prior versions are susceptible to resending multiple packets in a response to a reset packet sent from the client which the client again does not respond to, resulting in a limited amplification attack.
- risk 0.49cvss 7.5epss 0.01
OpenVPN Access Server before 2.11 uses a weak random generator used to create user session token for the web portal
- risk 0.49cvss 7.5epss 0.01
The OpenVPN Access Server installer creates a log file readable for everyone, which from version 2.10.0 and before 2.11.0 may contain a random generated admin password
- risk 0.49cvss 7.5epss 0.02
OpenVPN Access Server 2.7.3 to 2.8.7 allows remote attackers to trigger an assert during the user authentication phase via incorrect authentication token data in an early phase of the user authentication resulting in a denial of service.
- risk 0.49cvss 7.5epss 0.01
OpenVPN Access Server older than version 2.8.4 and version 2.9.5 generates new user authentication tokens instead of reusing exiting tokens on reconnect making it possible to circumvent the initial token expiry timestamp.
- risk 0.49cvss 7.5epss 0.01
An issue was discovered in OpenVPN Access Server before 2.7.0 and 2.8.x before 2.8.3. With the full featured RPC2 interface enabled, it is possible to achieve a temporary DoS state of the management interface when sending an XML Entity Expansion (XEE) payload to the XMLRPC based…
- risk 0.42cvss 6.4epss 0.00
Cross-site scripting (XSS) vulnerability in the SAML Authentication module in OpenVPN Access Server version 2.14.0 through 2.14.3 allows configured remote SAML Assertion Consumer Service (ACS) endpoint servers to inject arbitrary web script or HTML via the RelayState parameter
- risk 0.40cvss 6.1epss 0.01
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.
- risk 0.40cvss 6.1epss 0.05
CRLF injection vulnerability in the web interface in OpenVPN Access Server 2.1.4 allows remote attackers to inject arbitrary HTTP headers and consequently conduct session fixation attacks and possibly HTTP response splitting attacks via "%0A" characters in the PATH_INFO to…
- risk 0.35cvss 5.3epss 0.01
OpenVPN Access Server 2.8.7 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.
- CVE-2014-8104Dec 3, 2014risk 0.00cvss —epss 0.03
OpenVPN 2.x before 2.0.11, 2.1.x, 2.2.x before 2.2.3, and 2.3.x before 2.3.6 allows remote authenticated users to cause a denial of service (server crash) via a small control channel packet.
- CVE-2014-9104Nov 26, 2014risk 0.00cvss —epss 0.01
Multiple cross-site request forgery (CSRF) vulnerabilities in the XML-RPC API in the Desktop Client in OpenVPN Access Server 1.5.6 and earlier allow remote attackers to hijack the authentication of administrators for requests that (1) disconnecting established VPN sessions, (2)…
- CVE-2013-2692May 13, 2014risk 0.00cvss —epss 0.01
Cross-site request forgery (CSRF) vulnerability in the Admin web interface in OpenVPN Access Server before 1.8.5 allows remote attackers to hijack the authentication of administrators for requests that create administrative users.
- CVE-2013-2061Nov 18, 2013risk 0.00cvss —epss 0.03
The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on…
- CVE-2006-2229May 5, 2006risk 0.00cvss —epss 0.01
OpenVPN 2.0.7 and earlier, when configured to use the --management option with an IP that is not 127.0.0.1, uses a cleartext password for TCP sessions to the management interface, which might allow remote attackers to view sensitive information or cause a denial of service.
- CVE-2006-1629Apr 6, 2006risk 0.00cvss —epss 0.03
OpenVPN 2.0 through 2.0.5 allows remote malicious servers to execute arbitrary code on the client by using setenv with the LD_PRELOAD environment variable.
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