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    <title>Most recent entries from all</title>
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    <lastBuildDate>Thu, 01 Oct 2026 19:58:53 +0000</lastBuildDate>
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      <title>CVE-2026-61453 — Grav before 2.0.1 XSS via Twig String Concatenation</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-61453</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; getgrav grav&lt;/p&gt;
&lt;p&gt;Grav v2.0.0 contains a cross-site scripting vulnerability (fixed in 2.0.1). The XSS blueprint validator (Security::detectXss()) runs on raw page content before Twig processing. When Twig content processing is enabled (twig_content.process_enabled: true), an attacker with page-write API permission can use Twig&amp;#39;s string concatenation operator (~) to dynamically construct event handler names, dangerous tag names, or dangerous protocols at render time (e.g. {% set x = &amp;#34;on&amp;#34; ~ &amp;#34;error&amp;#34; %}). The validator sees only the harmless Twig expression and allows the content, but after Twig rendering the output (rendered via {{ page.content|raw }}) contains an active payload such as &amp;lt;img src=1 onerror=alert(1)&amp;gt;, executing arbitrary JavaScript in visitors&amp;#39; browsers.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; getgrav grav&lt;/p&gt;
&lt;p&gt;Grav v2.0.0 contains a cross-site scripting vulnerability (fixed in 2.0.1). The XSS blueprint validator (Security::detectXss()) runs on raw page content before Twig processing. When Twig content processing is enabled (twig_content.process_enabled: true), an attacker with page-write API permission can use Twig&amp;#39;s string concatenation operator (~) to dynamically construct event handler names, dangerous tag names, or dangerous protocols at render time (e.g. {% set x = &amp;#34;on&amp;#34; ~ &amp;#34;error&amp;#34; %}). The validator sees only the harmless Twig expression and allows the content, but after Twig rendering the output (rendered via {{ page.content|raw }}) contains an active payload such as &amp;lt;img src=1 onerror=alert(1)&amp;gt;, executing arbitrary JavaScript in visitors&amp;#39; browsers.&lt;/p&gt;</content:encoded>
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