CVE-2019-12581A reflective Cross-site scripting (XSS) vulnerability in the free_time_failed.cgi CGI program in selected Zyxel ZyWall, USG, and UAG…
- 6.1MediumCVSS base score
- 6.4%Exploitation in 30 daysEPSS · top 6.2% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
Description
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Nuclei template for it.
Show the exploits1
Nuclei templates1 template
- Zyxel ZyWal/USG/UAG Devices - Cross-Site Scripting (Nuclei template) (opens in a new tab)
http/cves/2019/CVE-2019-12581.yamlSeverity medium
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 25 days later
· 25 days later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 6.4% · top 6.2% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Affected products
n/a
- affected n/a
References
References4
- https://www.zyxel.com/us/en/ (opens in a new tab)x_refsource_MISCx_transferred
- https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://sec-consult.com/en/blog/advisories/reflected-cross-site-scripting-in-zxel-zywall/index.html (opens in a new tab)x_refsource_MISCx_transferred
- https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/ (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-4175 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-12581)Record last updated .