Overview
CVE-2025-55043 describes a CSRF vulnerability in MuraCMS up to version 10.1.10 where the bundle creation function (csettings.cfc createBundle) could be invoked by an unauthenticated attacker to coerce an administrator into generating and saving site bundles containing sensitive data to publicly accessible directories. The impact is severe: an attacker could exfiltrate user accounts, password hashes, form submissions, email lists, plugins, and site content without administrator knowledge, simply by enticing the admin to visit a malicious page that triggers the bundle creation in the admin session. While the underlying flaw is a CSRF issue, it represents a broader Broken Authentication class problem because an attacker leverages the admin’s authenticated session to perform privileged actions without explicit consent or token validation. The CVE highlights how trust in the admin’s browser and session can be abused to perform dangerous, data-leaking operations. In a Go (Gin) context, this vulnerability manifests when a state-changing endpoint relies solely on session cookie presence for authorization and omits CSRF protections, enabling cross-site requests to perform privileged actions on behalf of an authenticated user.
Affected Versions
MuraCMS <= 10.1.10 (CVE-2025-55043); N/A for Go (Gin) implementation in CVEs
Code Fix Example
Go (Gin) API Security Remediation
package main
import (
"crypto/rand"
"encoding/base64"
"net/http"
"os"
"path/filepath"
"github.com/gin-gonic/gin"
)
func main() {
r := gin.Default()
os.MkdirAll(filepath.Join("public","bundles"), 0755)
// Vulnerable: no CSRF protection on state-changing endpoint
r.POST("/admin/bundle/create", vulnerableBundleCreate)
// Secure: CSRF-protected endpoint
r.POST("/admin/bundle/create-secure", csrfProtection(), secureBundleCreate)
// Simple login to simulate admin session and CSRF token issuance
r.POST("/login", login)
r.Run(":8080")
}
// Vulnerable pattern: relies on cookie-based auth with no CSRF token validation
func vulnerableBundleCreate(c *gin.Context) {
if getCookie(c, "is_admin") != "1" {
c.AbortWithStatus(http.StatusUnauthorized)
return
}
name := c.PostForm("name")
data := c.PostForm("data")
path := filepath.Join("public","bundles", name+".bundle")
_ = os.WriteFile(path, []byte(data), 0644)
c.String(http.StatusOK, "vulnerable bundle created at %s", path)
}
// CSRF middleware for Go Gin example
func csrfProtection() gin.HandlerFunc {
return func(c *gin.Context) {
if c.Request.Method == http.MethodPost {
token := c.GetHeader("X-CSRF-Token")
if token == "" {
token = c.PostForm("csrf_token")
}
cookie, err := c.Request.Cookie("csrf_token")
if err != nil || token == "" || token != cookie.Value {
c.AbortWithStatus(http.StatusForbidden)
return
}
}
c.Next()
}
}
// Secure pattern: authenticated admin plus CSRF token required
func secureBundleCreate(c *gin.Context) {
if getCookie(c, "is_admin") != "1" {
c.AbortWithStatus(http.StatusUnauthorized)
return
}
name := c.PostForm("name")
data := c.PostForm("data")
path := filepath.Join("public","bundles", name+".bundle")
_ = os.WriteFile(path, []byte(data), 0644)
c.String(http.StatusOK, "secure bundle created at %s", path)
}
func login(c *gin.Context) {
user := c.PostForm("username")
pass := c.PostForm("password")
if user == "admin" && pass == "secret" {
http.SetCookie(c.Writer, &http.Cookie{Name: "is_admin", Value: "1", Path: "/", HttpOnly: true, Secure: false, SameSite: http.SameSiteStrictMode})
token := generateCSRFToken()
http.SetCookie(c.Writer, &http.Cookie{Name: "csrf_token", Value: token, Path: "/", HttpOnly: true, Secure: false, SameSite: http.SameSiteStrictMode})
c.String(http.StatusOK, "logged in")
} else {
c.AbortWithStatus(http.StatusUnauthorized)
}
}
func generateCSRFToken() string {
b := make([]byte, 32)
rand.Read(b)
return base64.RawStdEncoding.EncodeToString(b)
}
func getCookie(c *gin.Context, name string) string {
v, err := c.Request.Cookie(name)
if err != nil {
return ""
}
return v.Value
}