CVE-2021-26829 — AI Deep Analysis Summary

🚨 **Essence**: Stored XSS in OpenPLC ScadaBR. 📉 **Consequences**: Attackers inject malicious scripts via `system_settings.shtm`. Victims executing these scripts face session hijacking, data theft, or defacement.…

🛡️ **Root Cause**: Lack of input validation/sanitization on the `system_settings.shtm` page. 🐛 **Flaw**: Allows storage of executable JavaScript in system settings, triggering execution upon page load.…

📦 **Affected Products**: OpenPLC ScadaBR. 🖥️ **Versions**: Linux 0.9.1 & Windows 1.12.4. 🌐 **Vendor**: n/a (Open Source). ⚠️ Only these specific versions are confirmed vulnerable.

🕵️ **Actions**: Run arbitrary JavaScript in victim's browser. 💾 **Data**: Steal cookies, session tokens, or sensitive SCADA data. 🔄 **Privileges**: Execute actions as the logged-in user.…

🔓 **Auth**: Likely requires access to `system_settings.shtm`. ⚙️ **Config**: Needs ability to modify system settings. 📉 **Threshold**: Medium. If admin access is compromised, exploitation is trivial.…

🎥 **Exp**: Video PoC available at `youtu.be/Xh6LPCiLMa8`. 📢 **Status**: Publicly demonstrated. 🌍 **Wild Exp**: Forum discussions confirm awareness. ⚠️ Active exploitation risk is real.

🔍 **Check**: Scan for `system_settings.shtm` endpoint. 🧪 **Test**: Attempt to inject `<script>` tags into settings fields. 📡 **Scan**: Look for OpenPLC ScadaBR signatures. 🛑 Verify if input is sanitized before storage.

🛠️ **Patch**: Data does not list an official CVE patch. 📅 **Published**: June 11, 2021. 🔄 **Status**: Users must check vendor forums or update to newer, unlisted versions.…

🚧 **Workaround**: Restrict access to `system_settings.shtm`. 🛡️ **Mitigation**: Implement WAF rules to block XSS payloads. 🔒 **Access Control**: Limit admin panel access to trusted IPs only.…

🔥 **Urgency**: HIGH. 🏭 **Context**: Industrial systems are high-value targets. 📉 **Risk**: Stored XSS can lead to full system compromise. 🚨 **Action**: Patch immediately or apply strict network segmentation.…