Tor Browser vulnerabilitiesRanked by how likely they are to be used.
Tor Browser is made by Torproject. We track 5 published vulnerabilities in it, across 47 versions. None of them is on the list of flaws known to be exploited today. If you run Tor Browser, keep it on a version the vendor still supports.
We keep watching the known-exploited list.
Which Tor Browser vulnerabilities are being exploited?
This is the list that matters most: flaws criminals are using now.
None of Tor Browser's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.
Which Tor Browser flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 3.1%CVE-2018-16983Critical
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.
- 2.4%CVE-2017-16639Medium
Tor Browser on Windows before 8.0 allows remote attackers to bypass the intended anonymity feature and discover a client IP address, a different vulnerability than CVE-2017-16541.
- 2.2%CVE-2019-12383Medium
Tor Browser before 8.0.1 has an information exposure vulnerability.
- 1.9%CVE-2019-13075Medium
Tor Browser through 8.5.3 has an information exposure vulnerability.
- 0.5%CVE-2021-39246Medium
Tor Browser through 10.5.6 and 11.x through 11.0a4 allows a correlation attack that can compromise the privacy of visits to v2 onion addresses.
Running Tor Browser? We'll keep checking.
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1 new flaw affects software Acme tracks
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.
- Matched to
- Tor Browser on Acme's software list
- What to do
- Plan in the vendor’s update
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 5 published vulnerabilities listed under the name Tor Browser, across 47 versions.
None of Tor Browser's vulnerabilities is on the list of flaws known to be exploited today.
Create a Precursor Intelligence account and track Tor Browser. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.