Overview
The real-world impact of broken authentication is illustrated by CVE-2026-34731, where WWBN AVideo allowed unauthenticated users to terminate any active live stream via the on_publish_done.php endpoint in the Live plugin. Attackers could enumerate active stream keys from an unauthenticated stats.json.php endpoint and then send crafted POST requests to terminate streams, effectively causing denial-of-service for all live broadcasting features. This aligns with CWE-306 (Missing Authentication for Critical Function). In Go applications built with Gin, similar risks arise when a callback or state-changing endpoint is exposed without proper authentication or authorization checks, enabling attackers to manipulate resource state or disrupt services. The vulnerability manifests when an endpoint processes callbacks or performs privileged actions without validating who is making the request or whether they have rights to affect the targeted resource.
Affected Versions
WWBN AVideo: 26.0 and prior (CVE-2026-34731)
Code Fix Example
Go (Gin) API Security Remediation
package main
import (
"github.com/gin-gonic/gin"
)
type User struct {
ID int
Role string
}
func main() {
r := gin.Default()
// Vulnerable route: no auth required
r.POST("/live/on_publish_done/vulnerable", vulnerableOnPublishDone)
// Fixed route: requires auth and checks ownership/role
r.POST("/live/on_publish_done/fixed", authMiddleware(), fixedOnPublishDone)
r.Run()
}
func vulnerableOnPublishDone(c *gin.Context) {
var req struct {
StreamKey string `json:"stream_key"`
}
if err := c.BindJSON(&req); err != nil {
c.Status(400)
return
}
terminateStream(req.StreamKey)
c.Status(200)
}
func fixedOnPublishDone(c *gin.Context) {
u, _ := c.Get("user")
user := u.(User)
if !isAuthorized(user) {
c.Status(403)
return
}
var req struct {
StreamKey string `json:"stream_key"`
}
if err := c.BindJSON(&req); err != nil {
c.Status(400)
return
}
if !ownsStream(user, req.StreamKey) {
c.Status(403)
return
}
terminateStream(req.StreamKey)
c.Status(200)
}
func authMiddleware() gin.HandlerFunc {
return func(c *gin.Context) {
// In production: parse Authorization header, validate JWT, load user
// This is a minimal mock for demonstration purposes
c.Set("user", User{ID: 1, Role: "admin"})
c.Next()
}
}
func isAuthorized(u User) bool {
return u.Role == "admin" || u.Role == "stream_manager"
}
func ownsStream(u User, key string) bool {
// Placeholder: implement ownership check against a data store
return true
}
func terminateStream(key string) {
// Placeholder: update DB to mark the stream finished for the given key
}