XSS in Zyxel Uag2100
CVE-2019-12581
A reflective Cross-site scripting (XSS) vulnerability in the free_time_failed.cgi CGI program in selected Zyxel ZyWall, USG, and UAG devices allows remote attackers to inject arbitrary web script or HTML via the err_msg parameter.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.064 (93.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.064 · newest: 0.064 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.zyxel.com/us/en/ (Vendor Advisory)
- www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml (Patch, Vendor Advisory)
- sec-consult.com/en/blog/advisories/reflected-cross-site-scripting-in-zxel-zywal… (Exploit, Patch, Third Party Advisory)
- n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xs… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-12581?
- CVE-2019-12581 is a medium-severity vulnerability in Zyxel Uag2100, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-06-27.
- How severe is CVE-2019-12581?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2019-12581 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.