All vulnerabilitiesServers and applications
CVE-2013-4545 cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification (CURLOPT_SSL_VERIFYHOST) when the digital signature verification (CURLOPT_SSL_VERIFYPEER) is disabled, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
Severity Medium 4.3
Published 23 Nov 2013
Last changed 16 Jun 2026
Added to UpHeron 21 Oct 2026
Sources NVD Affected software Software Affected versions curlServers and applications · cpe:a:haxx:curl Version 7.32.0 Version 7.31.0 Version 7.30.0 Version 7.29.0 All 34 release lines Version 7.18.0 Version 7.18.1 Version 7.18.2 Version 7.19.0 Version 7.19.1 Version 7.19.2 Version 7.19.3 Version 7.19.4 Version 7.19.5 Version 7.19.6 Version 7.19.7 Version 7.20.0 Version 7.20.1 Version 7.21.0 Version 7.21.1 Version 7.21.2 Version 7.21.3 Version 7.21.4 Version 7.21.5 Version 7.21.6 Version 7.21.7 Version 7.22.0 Version 7.23.0 Version 7.23.1 Version 7.24.0 Version 7.25.0 Version 7.26.0 Version 7.27.0 Version 7.28.0 Version 7.28.1 Version 7.29.0 Version 7.30.0 Version 7.31.0 Version 7.32.0 curlServers and applications · cpe:a:haxx:libcurl Version 7.32.0 Version 7.31.0 Version 7.30.0 Version 7.29.0 All 34 release lines Version 7.18.0 Version 7.18.1 Version 7.18.2 Version 7.19.0 Version 7.19.1 Version 7.19.2 Version 7.19.3 Version 7.19.4 Version 7.19.5 Version 7.19.6 Version 7.19.7 Version 7.20.0 Version 7.20.1 Version 7.21.0 Version 7.21.1 Version 7.21.2 Version 7.21.3 Version 7.21.4 Version 7.21.5 Version 7.21.6 Version 7.21.7 Version 7.22.0 Version 7.23.0 Version 7.23.1 Version 7.24.0 Version 7.25.0 Version 7.26.0 Version 7.27.0 Version 7.28.0 Version 7.28.1 Version 7.29.0 Version 7.30.0 Version 7.31.0 Version 7.32.0
References NVD https://nvd.nist.gov/vuln/detail/CVE-2013-4545 CVE.org https://www.cve.org/CVERecord?id=CVE-2013-4545