gin-vue-admin is a backstage management system based on vue and gin, which separates the front and rear of the full stack. gin-vue-admin pseudoversion 0.0.0-20240407133540-7bc7c3051067, corresponding to version 2.6.1, has a code injection vulnerability in the backend. In the Plugin System -> Plugin Template feature, an attacker can perform directory traversal by manipulating the `plugName` parameter. They can create specific folders such as `api`, `config`, `global`, `model`, `router`, `service`, and `main.go` function within the specified traversal directory. Moreover, the Go files within these folders can have arbitrary code inserted based on a specific PoC parameter. The main reason for the existence of this vulnerability is the controllability of the PlugName field within the struct. Pseudoversion 0.0.0-20240409100909-b1b7427c6ea6, corresponding to commit b1b7427c6ea6c7a027fa188c6be557f3795e732b, contains a patch for the issue. As a workaround, one may manually use a filtering method available in the GitHub Security Advisory to rectify the directory traversal problem.

Affected: Go: github.com/flipped-aurora/gin-vue-admin/server

### Impact "gin-vue-admin<=v2.6.1 has a code injection vulnerability in the backend. In the Plugin System -> Plugin Template feature, an attacker can perform directory traversal by manipulating the 'plugName' parameter. They can create specific folders such as 'api', 'config', 'global', 'model', 'router', 'service', and 'main.go' function within the specified traversal directory. Moreover, the Go files within these folders can have arbitrary code inserted based on a specific PoC parameter."

Affected code: https://github.com/flipped-aurora/gin-vue-admin/blob/746af378990ebf3367f8bb3d4e9684936df152e7/server/api/v1/system/sys_auto_code.go:239. Let's take a look at the method 'AutoPlug' within the 'AutoCodeApi' struct. ```go func (autoApi *AutoCodeApi) AutoPlug(c *gin.Context) { var a system.AutoPlugReq err := c.ShouldBindJSON(&a) if err != nil { response.FailWithMessage(err.Error(), c) return } a.Snake = strings.ToLower(a.PlugName) a.NeedModel = a.HasRequest || a.HasResponse err = autoCodeService.CreatePlug(a) if err != nil { global.GVA_LOG.Error("预览失败!", zap.Error(err)) response.FailWithMessage("预览失败", c) return } response.Ok(c) } ``` The main reason for the existence of this vulnerability is the controllability of the PlugName field within the struct. ```go type AutoPlugReq struct { PlugName string `json:"plugName"` // 必然大写开头 Snake string `json:"snake"` // 后端自动转为 snake RouterGroup string `json:"routerGroup"` HasGloba…