What’s Vulnerable › Vulnerabilities

CVE-2023-23313

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-03 · updated 2026-06-17
• Weakness: CWE-79

Description

Certain Draytek products are vulnerable to Cross Site Scripting (XSS) via the wlogin.cgi script and user_login.cgi script of the router's web application management portal. This affects Vigor3910, Vigor1000B, Vigor2962 v4.3.2.1; Vigor2865 and Vigor2866 v4.4.1.0; Vigor2927 v4.4.2.2; and Vigor2915, Vigor2765, Vigor2766, Vigor2135 v4.4.2.0; Vigor2763 v4.4.2.1; Vigor2862 and Vigor2926 v3.9.9.0; Vigor2925 v3.9.3; Vigor2952 and Vigor3220 v3.9.7.3; Vigor2133 and Vigor2762 v3.9.6.4; and Vigor2832 v3.9.6.2.

Affected products

• DrayTek Vigor1000B Firmware: before 4.3.2.2 — fixed in 4.3.2.2
• DrayTek Vigor130 Firmware: before 3.8.5.1 — fixed in 3.8.5.1
• DrayTek Vigor165 Firmware: before 4.2.4.1 — fixed in 4.2.4.1
• DrayTek Vigor166 Firmware: before 4.2.4.1 — fixed in 4.2.4.1
• DrayTek Vigor2133 Firmware: before 3.9.6.5 — fixed in 3.9.6.5
• DrayTek Vigor2133Ac Firmware: before 3.9.6.5 — fixed in 3.9.6.5
• DrayTek Vigor2133Fvac Firmware: before 3.9.6.5 — fixed in 3.9.6.5
• DrayTek Vigor2133N Firmware: before 3.9.6.5 — fixed in 3.9.6.5
• DrayTek Vigor2133Vac Firmware: before 3.9.6.5 — fixed in 3.9.6.5
• DrayTek Vigor2135 Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2135Ac Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2135Ax Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2135Fvac Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2135Vac Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2762 Firmware: before 3.9.6.5 — fixed in 3.9.6.5
• DrayTek Vigor2762Ac Firmware: before 3.9.6.5 — fixed in 3.9.6.5
• DrayTek Vigor2762N Firmware: before 3.9.6.5 — fixed in 3.9.6.5
• DrayTek Vigor2762Vac Firmware: before 3.9.6.5 — fixed in 3.9.6.5
• DrayTek Vigor2763 Firmware: before 4.4.2.2 — fixed in 4.4.2.2
• DrayTek Vigor2763Ac Firmware: before 4.4.2.2 — fixed in 4.4.2.2
• DrayTek Vigor2765 Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2765Ac Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2765Ax Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2765Va Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2766 Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2766Ac Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2766Ax Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2766Vac Firmware: before 4.4.2.1 — fixed in 4.4.2.1
• DrayTek Vigor2832 Firmware: before 3.9.6.3 — fixed in 3.9.6.3
• DrayTek Vigor2832N Firmware: before 3.9.6.3 — fixed in 3.9.6.3

How to fix

Upgrade to a fixed version: DrayTek Vigor1000B Firmware 4.3.2.2; DrayTek Vigor130 Firmware 3.8.5.1; DrayTek Vigor165 Firmware 4.2.4.1; DrayTek Vigor166 Firmware 4.2.4.1; DrayTek Vigor2133 Firmware 3.9.6.5; DrayTek Vigor2133Ac Firmware 3.9.6.5; DrayTek Vigor2133Fvac Firmware 3.9.6.5; DrayTek Vigor2133N Firmware 3.9.6.5; DrayTek Vigor2133Vac Firmware 3.9.6.5; DrayTek Vigor2135 Firmware 4.4.2.1; DrayTek Vigor2135Ac Firmware 4.4.2.1; DrayTek Vigor2135Ax Firmware 4.4.2.1. Check the vendor advisory for mitigations.

References

• https://www.draytek.com/about/security-advisory/cross-site-scripting-vulnerability-%28cve-2023-23313%29/
• https://www.horizonconsulting.com/advisories23-Multiple-XSS-Stored-in-DrayTek-routers-CVE-2023-23313
• https://www.draytek.com/about/security-advisory/cross-site-scripting-vulnerability-%28cve-2023-23313%29/
• https://www.horizonconsulting.com/advisories23-Multiple-XSS-Stored-in-DrayTek-routers-CVE-2023-23313

Get alerted when CVE-2023-23313 or the next vulnerability affects your stack