CVE-2021-21311 — AI Deep Analysis Summary

🚨 **What is this vulnerability?** * **Essence:** It is a **Server-Side Request Forgery (SSRF)** flaw in Adminer. * **Mechanism:** The application exposes sensitive information in error messages, which attackers can …

🛠️ **Root Cause? (CWE/Flaw)** * **CWE ID:** **CWE-918** (Server-Side Request Forgery). * **The Flaw:** Poor design/implementation in code development. * **Specific Issue:** Lack of proper validation on user-suppli…

👥 **Who is affected? (Versions/Components)** * **Vendor:** **vrana** (Adminer). * **Product:** **Adminer** (Single-file PHP database management tool). * **Affected Versions:** * ✅ **v4.0.0** up to **v4.7.8*…

💣 **What can hackers do? (Privileges/Data)** * 🕵️ **Information Disclosure:** Obtain sensitive internal information via crafted error messages. * 📝 **Data Tampering:** Modify database data within the context of the …

🚪 **Is exploitation threshold high? (Auth/Config)** * **Access Vector (AV):** **Network** (Remote exploitation). * **Attack Complexity (AC):** **Low** (Easy to exploit). * **Privileges Required (PR):** **None** (N…

💻 **Is there a public Exp? (PoC/Wild Exploitation)** * **Yes!…

🔍 **How to self-check? (Features/Scanning)** * **Check Version:** Verify if your Adminer version is **< 4.7.9**. * **Scan for SSRF:** Use tools like **Nuclei** with the specific CVE template. * **Error Message Ana…

🛡️ **Is it fixed officially? (Patch/Mitigation)** * **Yes!…

🚧 **What if no patch? (Workaround)** * **Restrict Access:** Block external access to Adminer via **Firewall/WAF**. * **Disable Drivers:** If possible, remove bundled drivers to reduce attack surface. * **Input Val…

⚡ **Is it urgent? (Priority Suggestion)** * **CVSS Score:** **5.3** (Medium). * **Urgency:** 🟡 **HIGH PRIORITY**. * **Reason:** * Remote exploitation with **No Auth** required. * Public PoCs exist. …