What’s Vulnerable › Vulnerabilities

CVE-2018-6651

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-05 · updated 2026-06-17
• Weakness: CWE-352

Description

In the uncurl_ws_accept function in uncurl.c in uncurl before 0.07, as used in Parsec before 140-3, insufficient Origin header validation (accepting an arbitrary substring match) for WebSocket API requests allows remote attackers to bypass intended access restrictions. In Parsec, this means full control over the victim's computer.

Affected products

• Parsecgaming Parsec: before 140-3 — fixed in 140-3
• Uncurl Project Uncurl: before 0.07 — fixed in 0.07

How to fix

Upgrade to a fixed version: Parsecgaming Parsec 140-3; Uncurl Project Uncurl 0.07. Check the vendor advisory for mitigations.

References

• https://gist.github.com/Zenexer/ac7601c0e367d876353137e5099b18a7
• https://github.com/chrisd1100/uncurl/commit/448cd13e7b18c83855d706c564341ddd1e38e769
• https://github.com/chrisd1100/uncurl/releases/tag/0.07
• https://gist.github.com/Zenexer/ac7601c0e367d876353137e5099b18a7
• https://github.com/chrisd1100/uncurl/commit/448cd13e7b18c83855d706c564341ddd1e38e769
• https://github.com/chrisd1100/uncurl/releases/tag/0.07

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