CVE-2024-6781 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Path Traversal in Calibre's Content Server. 💥 **Consequences**: Attackers can read **arbitrary files** from the host system. Critical data exposure risk! 📂

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-22** (Path Traversal). 🔍 **Flaw**: Insufficient validation of user-supplied file paths in the content server component. Allows `../` sequences to escape directories.

Q: Who is affected? (Versions/Components)

👥 **Affected**: **Calibre** (Open Source E-book Manager). 📦 **Versions**: **7.14.0 and earlier**. If you are running an older version, you are vulnerable! ⚠️

Q: What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: 1️⃣ Read **sensitive files** (configs, keys, personal docs). 2️⃣ No authentication required. 3️⃣ High Confidentiality impact (C:H). 📉

Q: Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: **LOW**. ✅ **Auth**: None required (PR:N). ✅ **UI**: None required (UI:N). ✅ **Network**: Remote (AV:N). ✅ **Complexity**: Low (AC:L). Easy to exploit! 🚀

Q: Is there a public Exp? (PoC/Wild Exploitation)

💣 **Public Exp?**: **YES**. 📜 **PoC**: Available via **Nuclei Templates** (ProjectDiscovery). 🌐 **Wild Exploitation**: Likely, given the low barrier to entry. 🕸️

Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: 1️⃣ Check Calibre version (≤ 7.14.0). 2️⃣ Scan for exposed **Content Server** ports. 3️⃣ Use Nuclei template `CVE-2024-6781.yaml` for automated detection. 🤖

Q: Is it fixed officially? (Patch/Mitigation)

🛠️ **Fix**: **YES**. 📝 **Patch**: Commit `bcd0ab12c41a887f8290a9b56e46c3a29038d9c4` addresses the issue. 🔧 **Action**: Update Calibre immediately! 🆙

Q: What if no patch? (Workaround)

🚧 **No Patch?**: 1️⃣ **Disable** the Content Server if not needed. 2️⃣ Restrict network access to the Calibre interface via firewall. 3️⃣ Monitor logs for suspicious path traversal attempts. 🛑

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. 📅 **Published**: 2024-08-06. ⚡ **Reason**: Remote, unauthenticated, high impact. Patch now to prevent data leaks! 🏃♂️💨

Updated May 06, 2026 CVSS 7.5 · High

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Path Traversal in Calibre's Content Server. <br>💥 **Consequences**: Attackers can read **arbitrary files** from the host system. Critical data exposure risk! 📂

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-22** (Path Traversal). <br>🔍 **Flaw**: Insufficient validation of user-supplied file paths in the content server component. Allows `../` sequences to escape directories.

Q3Who is affected? (Versions/Components)

👥 **Affected**: **Calibre** (Open Source E-book Manager). <br>📦 **Versions**: **7.14.0 and earlier**. If you are running an older version, you are vulnerable! ⚠️

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: <br>1️⃣ Read **sensitive files** (configs, keys, personal docs). <br>2️⃣ No authentication required. <br>3️⃣ High Confidentiality impact (C:H). 📉

Q5Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: **LOW**. <br>✅ **Auth**: None required (PR:N). <br>✅ **UI**: None required (UI:N). <br>✅ **Network**: Remote (AV:N). <br>✅ **Complexity**: Low (AC:L). Easy to exploit! 🚀

Q6Is there a public Exp? (PoC/Wild Exploitation)

💣 **Public Exp?**: **YES**. <br>📜 **PoC**: Available via **Nuclei Templates** (ProjectDiscovery). <br>🌐 **Wild Exploitation**: Likely, given the low barrier to entry. 🕸️

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1️⃣ Check Calibre version (≤ 7.14.0). <br>2️⃣ Scan for exposed **Content Server** ports. <br>3️⃣ Use Nuclei template `CVE-2024-6781.yaml` for automated detection. 🤖

Q8Is it fixed officially? (Patch/Mitigation)

🛠️ **Fix**: **YES**. <br>📝 **Patch**: Commit `bcd0ab12c41a887f8290a9b56e46c3a29038d9c4` addresses the issue. <br>🔧 **Action**: Update Calibre immediately! 🆙

Q9What if no patch? (Workaround)

🚧 **No Patch?**: <br>1️⃣ **Disable** the Content Server if not needed. <br>2️⃣ Restrict network access to the Calibre interface via firewall. <br>3️⃣ Monitor logs for suspicious path traversal attempts. 🛑

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. <br>📅 **Published**: 2024-08-06. <br>⚡ **Reason**: Remote, unauthenticated, high impact. Patch now to prevent data leaks! 🏃‍♂️💨

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Vulnerability detail Full AI analysis (login) Calibre CWE-22