Since Jenkins 2.321 and LTS 2.332.1, the HTML output generated for new symbol-based SVG icons includes the title attribute of l:ionicon until Jenkins 2.334 and alt attribute of l:icon since Jenkins 2.335 without further escaping.
This vulnerability is known to be exploitable by attackers with Job/Configure permission.
Jenkins 2.356, LTS 2.332.4 and LTS 2.346.1 addresses this vulnerability, the title attribute of l:ionicon (Jenkins LTS 2.332.4) and alt attribute of l:icon (Jenkins 2.356 and LTS 2.346.1) are escaped in the generated HTML output.
{
"nvd_published_at": "2022-06-23T17:15:00Z",
"cwe_ids": [
"CWE-22",
"CWE-79"
],
"github_reviewed_at": "2022-12-06T00:05:44Z",
"severity": "HIGH",
"github_reviewed": true
}