What’s Vulnerable › Vulnerabilities

CVE-2018-16983

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-09-13 · updated 2026-06-17

Description

NoScript Classic before 5.1.8.7, as used in Tor Browser 7.x and other products, allows attackers to bypass script blocking via the text/html;/json Content-Type value.

Affected products

• Noscript: before 5.1.8.7 — fixed in 5.1.8.7
• torproject Tor Browser: from 7.0.0 through 7.0.11

How to fix

Upgrade to a fixed version: Noscript 5.1.8.7. Check the vendor advisory for mitigations.

References

• https://noscript.net/getit#classic
• https://twitter.com/Zerodium/status/1039127214602641409
• https://www.zdnet.com/article/exploit-vendor-drops-tor-browser-zero-day-on-twitter/
• https://noscript.net/getit#classic
• https://twitter.com/Zerodium/status/1039127214602641409
• https://www.zdnet.com/article/exploit-vendor-drops-tor-browser-zero-day-on-twitter/

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