Q: Root Cause? (CWE/Flaw)

🔍 **Root Cause**: - **Flaw Point**: The `textarea` in the comment editing form does not properly filter input. - **Corresponding CWE**: CWE-79 (Cross-Site Scripting).

Q: Who is affected? (Versions/Components)

👥 **Affected Scope**: - **Version**: ONLYOFFICE Docs versions **prior to 9.2.1**. - **Component**: Comment editing feature (`textarea`).

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

📉 **Exploitation Difficulty**: **Low**! - ✅ No special privileges needed (regular logged-in user is sufficient). - ✅ No complex configuration required. - ❌ UI interaction not necessary (UI:N).

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

🧪 **Existing Exploit**: - **PoC**: No public code available (pocs: []). - **In-the-wild Exploitation**: Not mentioned → not found yet.

Question 1

What is this vulnerability? (Essence + Consequences)

Accepted Answer

🚨 **Vulnerability Essence**: The comment editing `textarea` in ONLYOFFICE Docs < 9.2.1 has a **Cross-Site Scripting (XSS)** issue.…

Question 2

Root Cause? (CWE/Flaw)

Accepted Answer

🔍 **Root Cause**:   - **Flaw Point**: The `textarea` in the comment editing form does not properly filter input.   - **Corresponding CWE**: CWE-79 (Cross-Site Scripting).

Question 3

Who is affected? (Versions/Components)

Accepted Answer

👥 **Affected Scope**:   - **Version**: ONLYOFFICE Docs versions **prior to 9.2.1**.   - **Component**: Comment editing feature (`textarea`).

Question 4

What can hackers do? (Privileges/Data)

Accepted Answer

⚠️ **Attacker Capabilities**:   - **Required Privilege**: **Regular user (PR:L)** can trigger it.   - **Can Obtain**: Sensitive data of current user (e.g., Cookie, Token).…

Question 5

Is exploitation threshold high? (Auth/Config)

Accepted Answer

📉 **Exploitation Difficulty**: **Low**!   - ✅ No special privileges needed (regular logged-in user is sufficient).   - ✅ No complex configuration required.   - ❌ UI interaction not necessary (UI:N).

Question 6

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

Accepted Answer

🧪 **Existing Exploit**:   - **PoC**: No public code available (pocs: []).   - **In-the-wild Exploitation**: Not mentioned → not found yet.

Question 7

How to self-check? (Features/Scanning)

Accepted Answer

🔎 **Self-Check Method**:   - Check if version < 9.2.1? 🚨 High risk.   - Test whether the comment section `textarea` filters tags like `<script>`.…

Question 8

Is it fixed officially? (Patch/Mitigation)

Accepted Answer

🛡️ **Official Fix**:   - ✅ Fixed in version **9.2.1**.   - 🔗 Reference: [CHANGELOG](https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#921)

Question 9

What if no patch? (Workaround)

Accepted Answer

⏳ **Temporary Workaround Without Patch**:   - 🚫 Restrict or disable public commenting.   - 🔐 Enforce HTML escaping of input content (WAF/middleware layer).   - 👀 Strengthen output rendering security checks.

Question 10

Is it urgent? (Priority Suggestion)

Accepted Answer

🔥 **Priority**: **High**!   - CVSS 3.1: **5.4** (Medium), but affects multiple users & is easy to exploit.   - 💡 Recommend immediate upgrade to ≥ 9.2.1 or implement mitigation measures.

Goal Reached Thanks to every supporter — we hit 100%!

CVE-2025-68917 — AI Deep Analysis Summary

Q1What is this vulnerability? (Essence + Consequences)

Q2Root Cause? (CWE/Flaw)

Q3Who is affected? (Versions/Components)

Q4What can hackers do? (Privileges/Data)

Q5Is exploitation threshold high? (Auth/Config)

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

Q7How to self-check? (Features/Scanning)

Q8Is it fixed officially? (Patch/Mitigation)

Q9What if no patch? (Workaround)

Q10Is it urgent? (Priority Suggestion)

Continue exploring