电商网站Insecure Direct Object Reference漏洞的严重程度与优先级判定问询

Hey there, great job spotting this Insecure Direct Object Reference (IDOR) vulnerability—let’s break down its severity and priority clearly, as you’d expect in a formal vulnerability report or a practical Stack Overflow-style analysis:

Let’s ground this in common vulnerability severity frameworks (like CVSS or internal platform standards):

• Core Risk: This is a horizontal privilege escalation via IDOR, meaning an attacker can access and modify resources belonging to any other user without needing elevated permissions. The scope of impact covers every user on the platform, which is a major red flag.
• Specific Impacts:
  • Editing/deleting all users' saved product lists: Saved collections are personalized, user-curated data that users rely on for shopping planning. Mass deletion or modification would erase users' valuable shopping references, severely harming user experience and potentially driving users away from the platform.
  • Deleting all users' notifications: Notifications often include time-sensitive critical info—order updates,售后 reminders, platform alerts, etc. Removing these could lead users to miss important actions (like a return window closing), causing frustration, potential indirect financial loss, and eroding long-term trust in the platform.
• Final Severity Rating: High (or Critical if your platform’s framework prioritizes broad user impact). While this doesn’t directly enable account takeover or sensitive data exfiltration, the widespread disruption to user data and trust makes it a high-severity issue.

For prioritizing fixes, this should be marked as Critical:

• Low Exploit Barrier: IDORs are typically trivial to exploit—an attacker only needs to modify a simple parameter (like user_id in an HTTP request) to target any user. No advanced tools or specialized skills are required.
• Massive Impact Scope: A single attack could disrupt every user on the platform, leading to a flood of support tickets, negative reviews, and immediate reputational damage.
• Low Fix Effort: The fix is straightforward: add server-side validation to ensure the authenticated user’s ID matches the target resource’s owner ID. No major architectural changes are needed, so it can be deployed quickly to mitigate risk.

内容的提问来源于stack exchange，提问作者Mortada Jafar