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      <title>CVE-2026-12228 — Stored XSS in Direct Messages via Prompt Sharing in parisneo/lollms</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-12228</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; parisneo/lollms&lt;/p&gt;
&lt;p&gt;A stored cross-site scripting (XSS) vulnerability exists in the `POST /api/prompts/share` endpoint of parisneo/lollms (latest version). The endpoint stores attacker-controlled `prompt_content` into `DBDirectMessage.content` without server-side sanitization. When a victim opens the direct message (DM) thread, the message is rendered by the DM UI through `MessageContentRenderer`, which uses `v-html` to insert rendered HTML into the DOM. The frontend sanitizer, which is regex-based, fails to comprehensively sanitize attacker-controlled HTML, allowing malicious payloads to execute in the victim&amp;#39;s browser context. This vulnerability enables any authenticated user to send a malicious prompt-share message to another user&amp;#39;s inbox, leading to arbitrary JavaScript execution, authenticated actions as the victim, exposure of same-origin application data, and potential account takeover.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; parisneo/lollms&lt;/p&gt;
&lt;p&gt;A stored cross-site scripting (XSS) vulnerability exists in the `POST /api/prompts/share` endpoint of parisneo/lollms (latest version). The endpoint stores attacker-controlled `prompt_content` into `DBDirectMessage.content` without server-side sanitization. When a victim opens the direct message (DM) thread, the message is rendered by the DM UI through `MessageContentRenderer`, which uses `v-html` to insert rendered HTML into the DOM. The frontend sanitizer, which is regex-based, fails to comprehensively sanitize attacker-controlled HTML, allowing malicious payloads to execute in the victim&amp;#39;s browser context. This vulnerability enables any authenticated user to send a malicious prompt-share message to another user&amp;#39;s inbox, leading to arbitrary JavaScript execution, authenticated actions as the victim, exposure of same-origin application data, and potential account takeover.&lt;/p&gt;</content:encoded>
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