CVE-2026-5090
Template::Plugin::HTML versions before 3.103 for Perl allows HTML and JavaScript to be injected.
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Template::Plugin::HTML | before 3.103 |
Versions were read from the advisory text. No structured product data has been published for this record yet.