XSS in Zyxel Atp100
CVE-2023-35139
A cross-site scripting (XSS) vulnerability in the CGI program of the Zyxel ATP series firmware versions 5.10 through 5.37, USG FLEX series firmware versions 5.00 through 5.37, USG FLEX 50(W) series firmware versions 5.10 through 5.37, USG20(W)-VPN series firmware versions 5.10 through 5.37, and VPN series firmware versions 5.00 through 5.37, could allow an unauthenticated LAN-based attacker to store malicious scripts in a vulnerable device. A successful XSS attack could then result in the stored malicious scripts being executed to steal cookies when the user visits the specific CGI used for dumping ZTP logs.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.2 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Zyxel Atp100
- Zyxel Atp100w
- Zyxel Atp200
- Zyxel Atp500
- Zyxel Atp700
- Zyxel Atp800
- Zyxel Atp Series Firmware — versions versions 5.10 through 5.37
- Zyxel Usg 20w-Vpn
- Zyxel Usg20(w)-Vpn Series Firmware — versions versions 5.10 through 5.37
- Zyxel Usg Flex 100
Weakness classification (CWE)
References
- www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-35139?
- CVE-2023-35139 is a medium-severity vulnerability in Zyxel Atp100, classified under Cross-site Scripting. CVSS score: 5.2/10. Published 2023-11-28.
- How severe is CVE-2023-35139?
- Medium severity. CVSS v3 base score is 5.2 out of 10.