{"id":"CVE-2026-71236","published":"2026-08-05T11:16:26.377","lastModified":"2026-08-10T12:17:26.090","description":"Grocy's API request-body parser (controllers/Api/BaseApiController.php, GetParsedAndFilteredRequestBody) purifies incoming field values with HTMLPurifier, then manually reverses HTML-entity encoding of the resulting output by replacing &amp;lt;, &amp;gt;, and &amp;amp; back to <, >, and & immediately after purification.","cvssScore":8.7,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://github.com/grocy/grocy","tags":[]}],"exploitRefs":[{"url":"https://github.com/grocy/grocy","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows for injection of HTML entities that are later improperly decoded, potentially leading to Cross-Site Scripting (XSS) attacks.","exploitability":"Exploitation requires sending crafted API requests with specific HTML entities; moderate skill level needed.","blast_radius":"If exploited, this could lead to unauthorized script execution in users' browsers, compromising sensitive data or redirecting users to malicious sites.","remediation":"Update Grocy to a version that properly handles and decodes input to prevent XSS vulnerabilities.","tags":["xss","api","web","decoding"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T06:48:08.611Z"}}