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Q1What is this vulnerability? (Essence + Consequences)
๐จ **Essence**: OpenEMR has a **Reflected XSS** vulnerability. ๐ฅ **Consequences**: Attackers can inject malicious scripts via the `pricelevel` parameter.โฆ
๐ก๏ธ **Root Cause**: **CWE-79** (Improper Neutralization of Input During Web Page Generation). ๐ **Flaw**: The `pricelevel` parameter in OpenEMR does not properly sanitize user input.โฆ
๐ฅ **Vendor**: OpenEMR Community. ๐ฆ **Product**: OpenEMR (Open Source Medical Practice Management). ๐ **Affected Versions**: **Prior to 7.0.0.1**. โ **Safe**: Version 7.0.0.1 and later are patched.
Q4What can hackers do? (Privileges/Data)
๐ต๏ธ **Hackers Can**: Execute arbitrary JavaScript in the context of the victim's browser. ๐ช **Data Theft**: Steal session cookies or sensitive patient data displayed on the page.โฆ
๐ **Auth**: Likely requires the victim to be logged into OpenEMR or visit a crafted link. ๐ฏ **Config**: Exploitation relies on the `pricelevel` parameter being reflected in the response. ๐ **Threshold**: **Low**.โฆ
๐ **Public PoC**: Yes. A Nuclei template exists on GitHub (projectdiscovery/nuclei-templates). ๐ **Wild Exploit**: No widespread automated exploitation reported yet, but the PoC is public and easy to use.โฆ
๐ **Self-Check**: Scan for OpenEMR instances. ๐งช **Test**: Send a payload via the `pricelevel` parameter and check if it reflects in the HTML without sanitization.โฆ
โ **Fixed**: Yes. The vulnerability was patched in **version 7.0.0.1**. ๐ **Commit**: See GitHub commit 59458bc15ab0cb556c521de9d5187167d6f88945 for details.โฆ
๐ฅ **Priority**: **HIGH**. ๐ **Urgency**: Critical for healthcare providers. ๐ฅ **Reason**: Medical systems hold sensitive PII/PHI. A breach can lead to severe legal and reputational damage.โฆ