What is CVE-2023-23313?

CVE-2023-23313 is a medium-severity vulnerability in Draytek Vigor1000b, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-03-03.

How severe is CVE-2023-23313?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Draytek Vigor1000b

CVE-2023-23313

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-03-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (26.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.draytek.com/about/security-advisory/cross-site-scripting-vulnerability-(cve… (Vendor Advisory)
www.horizonconsulting.com/advisories23-Multiple-XSS-Stored-in-DrayTek-routers-C… (Third Party Advisory)

Frequently asked questions

What is CVE-2023-23313?: CVE-2023-23313 is a medium-severity vulnerability in Draytek Vigor1000b, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-03-03.
How severe is CVE-2023-23313?: Medium severity. CVSS v3 base score is 6.1 out of 10.