CVE-2026-5090 — Template::Plugin::HTML versions before 3.103 for Perl allows HTML and JavaScript to be injected
Template::Plugin::HTML versions before 3.103 for Perl allows HTML and JavaScript to be injected. The html_filter function did not escape single quotes. HTML attributes inside o…
Published: 2026-05-19 · CVSS: 6.1 · CVSS 3.1
Template::Plugin::HTML versions before 3.103 for Perl allows HTML and JavaScript to be injected. The html_filter function did not escape single quotes. HTML attributes inside of single quotes could be have code injected. For example, the variable "var" in <a id='ref' title='[% var | html %]'> would not be properly escaped. An attacker could insert some limited HTML and JavaScript, for example, var = " ' onclick='while (true) { alert(1) }'" Note that arbitrary HTML and JavaScript would be difficult to inject, because angle brackets, ampersands and double-quotes would still be escaped.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7