XSS in Zyxel Zywall 2 Plus Internet Security Appliance
CVE-2021-46387
ZyXEL ZyWALL 2 Plus Internet Security Appliance is affected by Cross Site Scripting (XSS). Insecure URI handling leads to bypass security restriction to achieve Cross Site Scripting, which allows an attacker able to execute arbitrary JavaScript codes to perform multiple attacks such as clipboard hijacking and session hijacking.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
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: 0.210 (97.5th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.210 · newest: 0.210 · change: -0.001
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.zyxel.com/us/en/support/security_advisories.shtml (Vendor Advisory)
- www.zyxel.com/uk/en/products_services/zywall_2_plus.shtml (Broken Link, Vendor Advisory)
- drive.google.com/drive/folders/1_XfWBLqxT2Mqt7uB663Sjlc62pE8-rcN (Exploit, Third Party Advisory)
- packetstormsecurity.com/files/166189/Zyxel-ZyWALL-2-Plus-Cross-Site-Scripting.h… (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-46387?
- CVE-2021-46387 is a medium-severity vulnerability in Zyxel Zywall 2 Plus Internet Security Appliance, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-03-01.
- How severe is CVE-2021-46387?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-46387 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.