{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/jeson-crm/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["high"],"_cs_tags":["ssrf","cve-2026-4623","jeson-crm","webserver"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA server-side request forgery (SSRF) vulnerability, identified as CVE-2026-4623, has been discovered in DefaultFuction Jeson-Customer-Relationship-Management-System up to version 1b4679c4d06b90d31dd521c2b000bfdec5a36e00. The vulnerability resides within the API Module, specifically in the /api/System.php file. An attacker can remotely manipulate the \u0026lsquo;url\u0026rsquo; argument, causing the server to make requests to unintended locations. Due to the product\u0026rsquo;s continuous delivery with rolling releases, specific version details are unavailable. A patch to address the vulnerability is identified as f76e7123fe093b8675f88ec8f71725b0dd186310/98bd4eb07fa19d4f2c5228de6395580013c97476. This vulnerability poses a significant risk as it allows attackers to potentially access internal resources, bypass security controls, and potentially escalate privileges.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker identifies an instance of DefaultFuction Jeson-Customer-Relationship-Management-System running version \u0026lt;= 1b4679c4d06b90d31dd521c2b000bfdec5a36e00.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious HTTP request targeting the \u003ccode\u003e/api/System.php\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThe crafted request includes the \u003ccode\u003eurl\u003c/code\u003e parameter, modified to point to an internal resource or external server controlled by the attacker.\u003c/li\u003e\n\u003cli\u003eThe server-side application processes the malicious request without proper validation of the \u003ccode\u003eurl\u003c/code\u003e parameter.\u003c/li\u003e\n\u003cli\u003eThe application initiates an HTTP request to the attacker-controlled URL or internal resource specified in the \u003ccode\u003eurl\u003c/code\u003e parameter.\u003c/li\u003e\n\u003cli\u003eThe server receives the response from the attacker-controlled server or internal resource.\u003c/li\u003e\n\u003cli\u003eThe application may process the response, potentially exposing sensitive information or allowing further exploitation.\u003c/li\u003e\n\u003cli\u003eIf successful, the attacker gains access to sensitive information, internal resources, or the ability to perform actions on behalf of the server.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this SSRF vulnerability (CVE-2026-4623) can lead to the exposure of sensitive internal data, such as configuration files, database credentials, or API keys. It may also allow attackers to bypass security controls, access internal services not intended for public access, and potentially escalate privileges within the application or the underlying infrastructure. Due to lack of information on the specific scope of usage for this CRM, the total number of potential victims is unclear. Organizations utilizing this vulnerable CRM are at risk.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the patch identified as f76e7123fe093b8675f88ec8f71725b0dd186310/98bd4eb07fa19d4f2c5228de6395580013c97476 to mitigate the CVE-2026-4623 vulnerability.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026ldquo;Detect Jeson CRM System.php SSRF Attempt\u0026rdquo; to your SIEM to detect exploitation attempts against the \u003ccode\u003e/api/System.php\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eImplement strict input validation and sanitization on the \u003ccode\u003eurl\u003c/code\u003e parameter within the \u003ccode\u003e/api/System.php\u003c/code\u003e endpoint to prevent malicious URL manipulation.\u003c/li\u003e\n\u003cli\u003eMonitor web server logs for suspicious requests to the \u003ccode\u003e/api/System.php\u003c/code\u003e endpoint, specifically those containing unusual or unexpected URLs in the \u003ccode\u003eurl\u003c/code\u003e parameter, to identify potential exploitation attempts.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-03-24T03:16:06Z","date_published":"2026-03-24T03:16:06Z","id":"/briefs/2026-03-jeson-crm-ssrf/","summary":"A server-side request forgery (SSRF) vulnerability exists in the DefaultFuction Jeson-Customer-Relationship-Management-System's API Module, specifically affecting the /api/System.php file, allowing remote attackers to manipulate the 'url' argument and potentially access internal resources.","title":"DefaultFuction Jeson-Customer-Relationship-Management-System Server-Side Request Forgery Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-03-jeson-crm-ssrf/"}],"language":"en","title":"CraftedSignal Threat Feed — Jeson-Crm","version":"https://jsonfeed.org/version/1.1"}