Overview
Like CVE-2026-33041, this guidance covers how a Broken Object Property Level Authorization flaw can manifest as information exposure: an endpoint reveals internal security details to unauthenticated clients. In WWBN AVideo, versions 25.0 and below exposed the application's password hashing algorithm via /objects/encryptPass.json.php, letting an attacker submit arbitrary passwords and receive their hashed equivalents. With access to leaked database hashes, an attacker could perform offline cracking more efficiently, since the chain md5+whirlpool+sha1 was used without per-password salt. This issue was fixed in version 26.0. This pattern maps to CWE-200: Information Exposure, and highlights why protecting access to object properties and internal security configurations is essential even when the attack surface seems innocuous. The remediation here translates that lesson into Go (Gin) practice for preventing similar leaks.
Affected Versions
WWBN AVideo: 25.0 and below; fixed in 26.0
Code Fix Example
Go (Gin) API Security Remediation
package main
import (
"net/http"
"github.com/gin-gonic/gin"
"golang.org/x/crypto/bcrypt"
)
func main() {
r := gin.Default()
// Vulnerable pattern: exposes internal hashing algorithm to unauthenticated users
r.GET("/objects/encryptPass.json.php", func(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{
"hashAlgorithm": "md5+whirlpool+sha1 (saltless by default)",
})
})
// Fixed pattern: do not disclose internal security details; require auth and use a modern hash
r.POST("/secure/encryptPass.json.php", authRequired(), func(c *gin.Context) {
var req struct {
Password string `json:"password"`
}
if err := c.ShouldBindJSON(&req); err != nil || req.Password == "" {
c.JSON(http.StatusBadRequest, gin.H{"error": "password required"})
return
}
hash, err := bcrypt.GenerateFromPassword([]byte(req.Password), bcrypt.DefaultCost)
if err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": "hashing failed"})
return
}
// Do not reveal the algorithm or the hash in responses in production.
c.JSON(http.StatusOK, gin.H{"hashedPassword": string(hash)})
})
r.Run(":8080")
}
func authRequired() gin.HandlerFunc {
return func(c *gin.Context) {
if c.GetHeader("X-API-KEY") != "let-me-in" {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
return
}
c.Next()
}
}