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Servers and applications

CVE-2018-0251

A vulnerability in the Web Server Authentication Required screen of the Clientless Secure Sockets Layer (SSL) VPN portal of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of that portal on an affected device. The vulnerability is due to insufficient validation of user-supplied input by…

Severity
Medium 6.1
Published
19 Apr 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.8% in the next 30 daysHigher than 79% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:o:cisco:adaptive_security_appliance_software
  • Version 9.8(2.15)
  • Version 9.9(1)

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-0251
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-0251