kwallet: crypto misuse

kwalletd in KWallet before KDE Applications 14.12.0 uses Blowfish with ECB mode instead of CBC mode when encrypting the password store, which makes it easier for attackers to guess passwords via a codebook attack.

messagepartthemes/default/defaultrenderer.cpp in messagelib in KDE Applications before 18.12.0 does not properly restrict the handling of an http-equiv="REFRESH" value.

The HTML thumbnailer plugin in KDE Applications before 18.12.0 allows attackers to trigger outbound TCP connections to arbitrary IP addresses, leading to disclosure of the source IP address.