Question 1

What is this vulnerability? (Essence + Consequences)

Accepted Answer

🚨 **Essence**: Mattermost allows authenticated users to upload files with **path traversal sequences** (e.g., `../`).…

Question 2

Root Cause? (CWE/Flaw)

Accepted Answer

🛡️ **Root Cause**: **CWE-427** (Uncontrolled Search Path Element).
🔍 **Flaw**: The **archive extractor** does not clean/validate filenames before extraction.…

Question 3

Who is affected? (Versions/Components)

Accepted Answer

📦 **Affected Versions**:
• 10.5.x (up to 10.5.5)
• 9.11.x (up to 9.11.15)
• 10.8.x (up to 10.8.0)
• 10.7.x (up to 10.7.2)
• 10.6.x (up to 10.6.5)
🏢 **Vendor**: Mattermost.

Question 4

What can hackers do? (Privileges/Data)

Accepted Answer

💀 **Attacker Capabilities**:
• **Write**: Arbitrary files anywhere on the filesystem.
• **Read**: Access sensitive data if they can trick the server into reading them.…

Question 5

Is exploitation threshold high? (Auth/Config)

Accepted Answer

🔐 **Threshold**: **Medium**.
✅ **Auth Required**: Yes, **PR:L** (Low Privileges). You need a valid Mattermost account.
🚫 **UI Required**: No (UI:N).
🌐 **Network**: Remote (AV:N).…

Question 6

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

Accepted Answer

📜 **Public Exploit**: **No**.
📂 **PoCs**: The `pocs` array is empty in the data.
🌍 **Wild Exploitation**: No evidence of widespread automated attacks yet.…

Question 7

How to self-check? (Features/Scanning)

Accepted Answer

🔍 **Self-Check**:
1. **Scan**: Check your Mattermost version against the affected list above.
2. **Logs**: Monitor upload logs for unusual filenames containing `../` or encoded traversal sequences.
3.…

Question 8

Is it fixed officially? (Patch/Mitigation)

Accepted Answer

🛠️ **Official Fix**: **Yes**.
📅 **Published**: 2025-06-20.
✅ **Action**: Upgrade to versions **newer** than the affected ones (e.g., 10.5.6+, 9.11.16+, etc.).…

Question 9

What if no patch? (Workaround)

Accepted Answer

🚧 **No Patch? Workarounds**:
1. **Disable File Uploads**: If not needed, restrict upload capabilities via admin settings.
2. **WAF Rules**: Block requests with path traversal patterns in file upload endpoints.…

Question 10

Is it urgent? (Priority Suggestion)

Accepted Answer

🔥 **Urgency**: **HIGH**.
⚡ **Priority**: Patch immediately.
📊 **CVSS**: 9.8 (Critical).
💡 **Why**: Even though it requires auth, the impact is **Complete** (Confidentiality, Integrity, Availability).…

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CVE-2025-4981 — 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)

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