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Q1What is this vulnerability? (Essence + Consequences)
🚨 **Essence**: Critical Auth Bypass in CleanTalk Plugin. <br>💥 **Consequences**: Leads to Arbitrary Plugin Installation & Remote Code Execution (RCE). Your server is compromised.
Q2Root Cause? (CWE/Flaw)
🔍 **Root Cause**: CWE-350 (Improper Resolution of the Vulnerability). <br>🛡️ **Flaw**: Authorization Bypass. The plugin fails to properly verify permissions before executing critical actions.
Q3Who is affected? (Versions/Components)
📦 **Affected**: WordPress Plugin: **Spam protection, Anti-Spam, FireWall by CleanTalk**. <br>📅 **Version**: **6.71 and earlier**. Check your version immediately!
Q4What can hackers do? (Privileges/Data)
👑 **Privileges**: Attacker gains **Full Control**. <br>📂 **Data**: Can install any plugin, execute arbitrary code, and access sensitive data. CVSS Score: **9.1 (Critical)**.
Q5Is exploitation threshold high? (Auth/Config)
⚡ **Threshold**: **LOW**. <br>🔓 **Auth**: No authentication required (PR:N). <br>🌐 **Network**: Network accessible (AV:N). <br>🖱️ **UI**: No user interaction needed (UI:N). Easy to exploit!
Q6Is there a public Exp? (PoC/Wild Exploitation)
💻 **Exploit**: **YES**. <br>🔗 **PoC**: Public Proof-of-Concept available on GitHub (comthompson30/CVE-2026-1490). <br>⚠️ **Risk**: Wild exploitation is highly likely.
Q7How to self-check? (Features/Scanning)
🔎 **Self-Check**: <br>1. Go to WP Dashboard > Plugins. <br>2. Find **CleanTalk**. <br>3. Check Version Number. <br>4. If ≤ 6.71, you are **VULNERABLE**.
Q8Is it fixed officially? (Patch/Mitigation)
🛠️ **Fix**: **YES**. <br>📢 **Patch**: Update to the latest version via WordPress admin or manual replacement. <br>🔗 **Ref**: See WordPress Trac changeset 3454488.
Q9What if no patch? (Workaround)
🚧 **No Patch?**: <br>1. **Disable** the plugin immediately. <br>2. **Delete** it if not needed. <br>3. Monitor logs for suspicious plugin installations. <br>4. Isolate the server if RCE is suspected.
Q10Is it urgent? (Priority Suggestion)
🔥 **Urgency**: **CRITICAL**. <br>🚨 **Priority**: **IMMEDIATE ACTION REQUIRED**. <br>💡 **Insight**: With public PoC and no auth needed, patch NOW or disable the plugin to prevent total server takeover.