{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/hoteam-plm/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":7.3,"id":"CVE-2026-5261"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["critical"],"_cs_tags":["CVE-2026-5261","unrestricted-upload","hoteam-plm"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA critical vulnerability, CVE-2026-5261, has been identified in Shandong Hoteam InforCenter PLM software, specifically in versions up to 8.3.8. This vulnerability resides in the \u003ccode\u003euploadFileToIIS\u003c/code\u003e function located within the \u003ccode\u003e/Base/BaseHandler.ashx\u003c/code\u003e file.  The vulnerability allows unauthenticated remote attackers to upload arbitrary files to the server due to a lack of proper input validation and access controls. The exploit is publicly available, increasing the risk of widespread exploitation. The vendor was notified but did not respond. This vulnerability poses a significant threat, as successful exploitation can lead to arbitrary code execution, data breaches, and complete system compromise.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies a vulnerable Shandong Hoteam InforCenter PLM instance running version 8.3.8 or earlier.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP request targeting the \u003ccode\u003e/Base/BaseHandler.ashx\u003c/code\u003e endpoint, specifically invoking the \u003ccode\u003euploadFileToIIS\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe attacker includes a \u003ccode\u003eFile\u003c/code\u003e parameter in the request, containing a payload such as a webshell or other executable code disguised as a seemingly benign file type.\u003c/li\u003e\n\u003cli\u003eDue to the unrestricted file upload vulnerability (CVE-2026-5261), the server accepts and stores the attacker\u0026rsquo;s malicious file without proper validation.\u003c/li\u003e\n\u003cli\u003eThe attacker determines the final storage location of the uploaded file on the server\u0026rsquo;s file system.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a new HTTP request to access the uploaded file, triggering its execution.\u003c/li\u003e\n\u003cli\u003eThe attacker gains a foothold on the server and can execute arbitrary commands.\u003c/li\u003e\n\u003cli\u003eThe attacker can then escalate privileges, move laterally within the network, exfiltrate sensitive data, or cause other damage to the system.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-5261 allows a remote, unauthenticated attacker to upload arbitrary files to the vulnerable server. This can lead to arbitrary code execution and complete system compromise, potentially impacting all data and processes managed by the PLM software. There is currently no information about the number of affected systems or specific industries targeted, but the availability of a public exploit increases the potential for widespread attacks. Successful exploitation can result in data breaches, financial losses, and reputational damage.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply available patches or upgrade to a secure version of Shandong Hoteam InforCenter PLM to remediate CVE-2026-5261.\u003c/li\u003e\n\u003cli\u003eImplement a web application firewall (WAF) rule to block requests with suspicious file extensions or content types being uploaded to \u003ccode\u003e/Base/BaseHandler.ashx\u003c/code\u003e to mitigate exploitation attempts.\u003c/li\u003e\n\u003cli\u003eMonitor web server logs for suspicious POST requests to \u003ccode\u003e/Base/BaseHandler.ashx\u003c/code\u003e with unusually large file sizes or unusual file extensions as indicated in the \u0026ldquo;Detect Suspicious PLM Uploads\u0026rdquo; Sigma rule.\u003c/li\u003e\n\u003cli\u003eImplement file integrity monitoring (FIM) on the web server\u0026rsquo;s upload directories to detect unauthorized file creations or modifications to identify successful exploitation.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-01T09:16:17Z","date_published":"2026-04-01T09:16:17Z","id":"/briefs/2026-04-hoteam-plm-upload/","summary":"CVE-2026-5261 is an unrestricted file upload vulnerability in Shandong Hoteam InforCenter PLM up to version 8.3.8, allowing remote attackers to execute arbitrary code by uploading malicious files via the uploadFileToIIS function.","title":"Shandong Hoteam InforCenter PLM Unrestricted Upload Vulnerability (CVE-2026-5261)","url":"https://feed.craftedsignal.io/briefs/2026-04-hoteam-plm-upload/"}],"language":"en","title":"CraftedSignal Threat Feed — Hoteam-Plm","version":"https://jsonfeed.org/version/1.1"}