MHonArc 2.5.2 and earlier does not properly filter Javascript from archived e-mail messages, which could allow remote attackers to execute script in web clients by (1) splitting the SCRIPT tag into smaller pieces, (2) including the script in a SRC argument to an IMG tag, or (3) using "&={script}" syntax.

Cross-site scripting vulnerability (XSS) in MHonArc 2.5.12 and earlier allows remote attackers to insert script or HTML via an email message with the script in a MIME header name.

Cross-site scripting (XSS) vulnerability in MHonArc before 2.5.14 allows remote attackers to inject arbitrary HTML into web archive pages via HTML mail messages.

MHonArc 2.6.16 allows remote attackers to cause a denial of service (CPU consumption) via start tags that are placed within other start tags, as demonstrated by a <bo<bo<bo<bo<body>dy>dy>dy>dy> sequence, a different vulnerability than CVE-2010-4524.

Cross-site scripting (XSS) vulnerability in lib/mhtxthtml.pl in MHonArc 2.6.16 allows remote attackers to inject arbitrary web script or HTML via a malformed start tag and end tag for a SCRIPT element, as demonstrated by <scr<body>ipt> and </scr<body>ipt> sequences.