nextlevelbuilder GoClaw SSRF and Path Traversal Flaws
2026-07-14
Information disclosure in nextlevelbuilder GoClaw up to version 3.13.3-beta.3 allows remote low-privileged attackers to extract sensitive data by manipulating the `args.targetUrl` argument passed to the `handleNavigate` function in `pkg/browser/tool.go`. A public proof-of-concept exploit exists and is referenced via GitHub issue #1207, elevating the practical risk beyond the moderate CVSS 4.0 score of 5.3. No confirmed patched release has been identified at the time of analysis, leaving all known versions of the product exposed.
GoClaw 3.11.3 by nextlevelbuilder exposes an incomplete blacklist bypass in the ExecApprovalManager.CheckCommand function, allowing authenticated low-privilege remote attackers to circumvent command approval controls enforced in internal/tools/exec_approval.go. The bypass can yield limited confidentiality, integrity, and availability impacts consistent with the information-disclosure tag and the VC:L/VI:L/VA:L CVSS 4.0 impact metrics. No public exploit identified at time of analysis is incorrect here - a public proof-of-concept exploit exists per the referenced GitHub issue, lowering the technical bar for abuse.
Server-side request forgery in GoClaw 3.13.3-beta.3 enables authenticated remote attackers to manipulate the `output.video_url` parameter within the `bytePlusDownloadVideo` function, coercing the server into issuing HTTP requests to attacker-controlled destinations including internal network resources. The flaw resides in `internal/tools/create_video_byteplus.go` at the invoke endpoint. A proof-of-concept exploit has been publicly disclosed via GitHub issue #1199; however, no CISA KEV listing confirms mass active exploitation, and the CVSS 4.0 score of 2.1 reflects the low-privilege authentication barrier and limited per-request impact scope.
Path traversal in GoClaw 3.13.3-beta.3 allows authenticated remote attackers to read or write files outside the intended workspace directory by manipulating the path argument to the `writeFile` function in the ACP ToolBridge Workspace Handler (`internal/providers/acp/tool_bridge.go`). A proof-of-concept exploit has been publicly disclosed via a GitHub issue, lowering the bar for exploitation. No CISA KEV listing indicates active widespread exploitation has not been confirmed at time of analysis.