CVE-2020-11023 — AI Deep Analysis Summary

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

🚨 **Essence**: jQuery DOM manipulation flaw allowing XSS. 💥 **Consequences**: Attackers inject malicious scripts via `<option>` elements. Client-side code executes, compromising user data and session integrity.

Q: Root Cause? (CWE/Flaw)

🛡️ **CWE-79**: Improper Neutralization of Input During Web Page Generation (XSS). 🔍 **Flaw**: jQuery fails to properly sanitize/validate untrusted HTML containing `<option>` tags before DOM insertion.

Q: Who is affected? (Versions/Components)

📦 **Vendor**: jQuery. 📉 **Affected**: Versions **1.0.3** up to **3.5.0** (exclusive). ⚠️ **Note**: Any app using these jQuery versions is at risk.

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

📊 **Threshold**: Medium. 🔑 **Auth**: No authentication required (PR:N). 🖱️ **UI**: Requires User Interaction (UI:R) to trigger the payload. 🌐 **Network**: Network accessible (AV:N).

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

🔍 **Self-Check**: Scan for jQuery versions < 3.5.0. 🧪 **Test**: Inject HTML with `<option>` tags into DOM methods. 🛠️ **Tools**: Use scanners targeting CVE-2020-11023 (e.g., `honeyb33z` scanner).

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

✅ **Fixed**: YES. 📦 **Patch**: Upgrade to **jQuery 3.5.0** or later. 📝 **Official**: Confirmed by jQuery team and referenced in Apache/Oracle advisories.

Q: What if no patch? (Workaround)

🚧 **No Patch?**: Use **DOMPurify** library to sanitize inputs before passing to jQuery DOM methods. 🚫 **Avoid**: Do not pass untrusted HTML containing `<option>` elements to `.html()`, `.append()`, etc.

Q: Is it urgent? (Priority Suggestion)

⚡ **Urgency**: HIGH. 📈 **Priority**: Critical for web apps using older jQuery. 🏃 **Action**: Immediate upgrade recommended to prevent client-side compromise.

Updated May 06, 2026 CVSS 6.9 · Medium

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**: jQuery DOM manipulation flaw allowing XSS. <br>💥 **Consequences**: Attackers inject malicious scripts via `<option>` elements. Client-side code executes, compromising user data and session integrity.

Q2Root Cause? (CWE/Flaw)

🛡️ **CWE-79**: Improper Neutralization of Input During Web Page Generation (XSS). <br>🔍 **Flaw**: jQuery fails to properly sanitize/validate untrusted HTML containing `<option>` tags before DOM insertion.

Q3Who is affected? (Versions/Components)

📦 **Vendor**: jQuery. <br>📉 **Affected**: Versions **1.0.3** up to **3.5.0** (exclusive). <br>⚠️ **Note**: Any app using these jQuery versions is at risk.

Q4What can hackers do? (Privileges/Data)

🕵️ **Privileges**: Client-side execution context. <br>📂 **Data**: Steal cookies, session tokens, or perform actions on behalf of the victim.…

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Q5Is exploitation threshold high? (Auth/Config)

📊 **Threshold**: Medium. <br>🔑 **Auth**: No authentication required (PR:N). <br>🖱️ **UI**: Requires User Interaction (UI:R) to trigger the payload. <br>🌐 **Network**: Network accessible (AV:N).

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

🔓 **Public Exp?**: YES. <br>📂 **PoCs**: Multiple GitHub repos (e.g., `Snorlyd`, `Cybernegro`) demonstrate DOM XSS via `.html()`, `.append()`.…

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Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for jQuery versions < 3.5.0. <br>🧪 **Test**: Inject HTML with `<option>` tags into DOM methods. <br>🛠️ **Tools**: Use scanners targeting CVE-2020-11023 (e.g., `honeyb33z` scanner).

Q8Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: YES. <br>📦 **Patch**: Upgrade to **jQuery 3.5.0** or later. <br>📝 **Official**: Confirmed by jQuery team and referenced in Apache/Oracle advisories.

Q9What if no patch? (Workaround)

🚧 **No Patch?**: Use **DOMPurify** library to sanitize inputs before passing to jQuery DOM methods. <br>🚫 **Avoid**: Do not pass untrusted HTML containing `<option>` elements to `.html()`, `.append()`, etc.

Q10Is it urgent? (Priority Suggestion)

⚡ **Urgency**: HIGH. <br>📈 **Priority**: Critical for web apps using older jQuery. <br>🏃 **Action**: Immediate upgrade recommended to prevent client-side compromise.

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Vulnerability detail Full AI analysis (login) jquery CWE-79