EUVD-2026-30995
GHSA-xhg9-j279-j625
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
4DescriptionCVE.org
Template::Plugin::HTML versions through 3.102 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.
AnalysisAI
Cross-site scripting in Template::Plugin::HTML versions through 3.102 for Perl allows remote unauthenticated attackers to inject JavaScript event handlers into rendered HTML pages when victim users view pages containing attacker-controlled template variables. The html_filter function and HTML.escape method omitted escaping of single-quote characters, meaning variables filtered with | html inside single-quoted HTML attributes (e.g., title='[% var | html %]') remained injectable. No public exploit has been identified at time of analysis and EPSS is 0.01% (1st percentile), indicating no observed widespread exploitation, though the attack primitive is straightforward for any attacker aware of the single-quote gap.
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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