{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/improper-authorization/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":7.3,"id":"CVE-2026-7505"}],"_cs_exploited":false,"_cs_products":["GoClaw (\u003c= 3.8.5)","GoClaw Lite (\u003c= 3.8.5)"],"_cs_severities":["high"],"_cs_tags":["improper-authorization","rpc-handler","goclaw"],"_cs_type":"advisory","_cs_vendors":["nextlevelbuilder"],"content_html":"\u003cp\u003enextlevelbuilder GoClaw and GoClaw Lite, up to version 3.8.5, contain an improper authorization vulnerability within the RPC Handler component. This flaw allows remote attackers to potentially bypass intended security restrictions, leading to unauthorized access or modification of data. Publicly available exploit code exists, increasing the risk of exploitation. The vulnerability is identified as CVE-2026-7505. Organizations using affected versions of GoClaw or GoClaw Lite should upgrade to version 3.9.0, which includes a patch (406022e79f4a18b3070a446712080571eff11e30) to mitigate this issue. Successful exploitation could lead to unauthorized data access, modification, or other malicious activities.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable instance of nextlevelbuilder GoClaw or GoClaw Lite running version 3.8.5 or earlier.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious RPC request targeting the vulnerable RPC Handler component.\u003c/li\u003e\n\u003cli\u003eThe attacker sends the crafted RPC request to the vulnerable GoClaw/GoClaw Lite instance remotely.\u003c/li\u003e\n\u003cli\u003eDue to the improper authorization, the RPC Handler processes the request without proper authentication or authorization checks.\u003c/li\u003e\n\u003cli\u003eThe attacker gains unauthorized access to functions or data within the GoClaw/GoClaw Lite application.\u003c/li\u003e\n\u003cli\u003eThe attacker modifies data, executes unauthorized commands, or performs other malicious actions within the application\u0026rsquo;s scope.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages the compromised application to further escalate privileges or gain access to other systems.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-7505 allows an unauthenticated remote attacker to bypass authorization controls in nextlevelbuilder GoClaw and GoClaw Lite. This can lead to unauthorized access to sensitive data, modification of system configurations, or execution of arbitrary commands. While the number of affected installations is unknown, organizations utilizing these products should consider this a high-risk vulnerability due to the availability of exploit code.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImmediately upgrade nextlevelbuilder GoClaw and GoClaw Lite to version 3.9.0 to apply the security patch (406022e79f4a18b3070a446712080571eff11e30), as mentioned in the overview.\u003c/li\u003e\n\u003cli\u003eMonitor network traffic for suspicious RPC requests targeting GoClaw/GoClaw Lite servers using network connection logs.\u003c/li\u003e\n\u003cli\u003eDeploy web server access rules to detect and block access to the RPC Handler component from unauthorized IP addresses.\u003c/li\u003e\n\u003cli\u003eReview and harden access control lists for the GoClaw/GoClaw Lite application to prevent unauthorized access.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-30T23:16:20Z","date_published":"2026-04-30T23:16:20Z","id":"/briefs/2026-04-goclaw-auth-bypass/","summary":"nextlevelbuilder GoClaw and GoClaw Lite versions up to 3.8.5 are vulnerable to improper authorization in the RPC Handler component, potentially allowing remote attackers to bypass security controls.","title":"nextlevelbuilder GoClaw and GoClaw Lite Improper Authorization Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-04-goclaw-auth-bypass/"},{"_cs_actors":[],"_cs_cves":[{"cvss":7.3,"id":"CVE-2026-6105"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["critical"],"_cs_tags":["CVE-2026-6105","Improper Authorization","go-fastdfs-web"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA critical security vulnerability, CVE-2026-6105, has been identified in perfree go-fastdfs-web, affecting versions up to 1.3.7. The vulnerability resides in the \u003ccode\u003esrc/main/java/com/perfree/controller/InstallController.java\u003c/code\u003e file, specifically within the \u003ccode\u003edoInstall\u003c/code\u003e Interface component. This flaw allows for improper authorization, enabling remote attackers to potentially bypass security measures and gain unauthorized access. The exploit has been publicly disclosed, increasing the risk of exploitation. The vendor was notified but has not responded, exacerbating the potential impact. Defenders should prioritize detection and mitigation efforts to prevent unauthorized access.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker identifies a vulnerable perfree go-fastdfs-web instance running a version up to 1.3.7.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious request targeting the \u003ccode\u003edoInstall\u003c/code\u003e interface.\u003c/li\u003e\n\u003cli\u003eThe crafted request exploits the improper authorization vulnerability (CVE-2026-6105) in \u003ccode\u003eInstallController.java\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eThe application fails to properly validate the attacker\u0026rsquo;s privileges.\u003c/li\u003e\n\u003cli\u003eThe attacker gains unauthorized access to sensitive functionalities due to the bypassed authorization checks.\u003c/li\u003e\n\u003cli\u003eThe attacker performs unauthorized actions, such as modifying system settings or accessing restricted data.\u003c/li\u003e\n\u003cli\u003eThe attacker may leverage the initial access to further compromise the system or network.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-6105 allows an unauthenticated remote attacker to bypass authorization controls in perfree go-fastdfs-web. The impact includes potential unauthorized access to sensitive data, modification of system configurations, and complete system compromise. Given the public disclosure of the exploit, organizations using affected versions of perfree go-fastdfs-web are at high risk of attack. The lack of vendor response further amplifies the threat.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetect Suspicious doInstall Interface Access\u003c/code\u003e to identify unauthorized access attempts to the vulnerable endpoint (logsource: webserver, product: linux).\u003c/li\u003e\n\u003cli\u003eMonitor web server logs for suspicious requests targeting the \u003ccode\u003edoInstall\u003c/code\u003e interface in \u003ccode\u003eInstallController.java\u003c/code\u003e (logsource: webserver, product: linux).\u003c/li\u003e\n\u003cli\u003eApply input validation and authorization checks to the \u003ccode\u003edoInstall\u003c/code\u003e Interface in \u003ccode\u003eInstallController.java\u003c/code\u003e to mitigate CVE-2026-6105.\u003c/li\u003e\n\u003cli\u003eConsider implementing a Web Application Firewall (WAF) rule to block requests matching the exploit pattern.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-11T22:16:01Z","date_published":"2026-04-11T22:16:01Z","id":"/briefs/2026-04-go-fastdfs-web-authz-bypass/","summary":"CVE-2026-6105 is a critical vulnerability in perfree go-fastdfs-web versions up to 1.3.7, allowing for remote improper authorization due to a flaw in the doInstall Interface, potentially leading to unauthorized system access and control.","title":"perfree go-fastdfs-web Improper Authorization Vulnerability (CVE-2026-6105)","url":"https://feed.craftedsignal.io/briefs/2026-04-go-fastdfs-web-authz-bypass/"}],"language":"en","title":"CraftedSignal Threat Feed — Improper-Authorization","version":"https://jsonfeed.org/version/1.1"}