Medium severity · published Jun 27, 2019
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…
6.1
CVSS
6.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)6.4% · higher than 94% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UF
Uag2100 Firmware · Zyxel
through 4.18\(aaiz.1\)c0 · source: NVD
UF
Uag4100 Firmware · Zyxel
through 4.18\(aatd.1\)c0 · source: NVD
UF
Uag5100 Firmware · Zyxel
through 4.18\(aapn.1\)c0 · source: NVD
UF
Usg110 Firmware · Zyxel
through 4.30 · source: NVD
UF
Usg1100 Firmware · Zyxel
through 4.30 · source: NVD
UF
Usg1900 Firmware · Zyxel
through 4.30 · source: NVD
UF
Usg210 Firmware · Zyxel
through 4.30 · source: NVD
UF
Usg2200-vpn Firmware · Zyxel
through 4.30 · source: NVD
UF
Usg310 Firmware · Zyxel
through 4.30 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-12581
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-12581
Exploit
https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/
Exploit
https://sec-consult.com/en/blog/advisories/reflected-cross-site-scripting-in-zxel-zywall/index.html
Patch
https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml
Vendor Advisory
https://www.zyxel.com/us/en/
More from Uag2100 Firmware
9.1
CVE-2019-12583
Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the…