Webrick vulnerabilitiesRanked by how likely they are to be used.
Webrick is made by Ruby-Lang. We track 5 published vulnerabilities in it, across 16 versions. None of them is on the list of flaws known to be exploited today. If you run Webrick, keep it on a version the vendor still supports.
We keep watching the known-exploited list.
Which Webrick vulnerabilities are being exploited?
This is the list that matters most: flaws criminals are using now.
None of Webrick's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.
Which Webrick 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.
- 28%CVE-2008-1145Medium
Directory traversal vulnerability in WEBrick in Ruby 1.8 before 1.8.5-p115 and 1.8.6-p114, and 1.9 through 1.9.0-1, when running on systems that support backslash (\) path separators or case-insensitive file names,...
- 3.8%CVE-2020-25613High
An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1.
- 0.5%CVE-2019-11879Medium
The WEBrick gem 1.4.2 for Ruby allows directory traversal if the attacker once had local access to create a symlink to a location outside of the web root directory.
- 0.5%CVE-2025-6442Medium
Ruby WEBrick read_header HTTP Request Smuggling Vulnerability.
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1 new flaw affects software Acme tracks
Directory traversal vulnerability in WEBrick in Ruby 1.8 before 1.8.5-p115 and 1.8.6-p114, and 1.9 through 1.9.0-1, when running on systems that support backslash (\) path separators or case-insensitive file names, allows remote attackers to access arbitrary files via (1) "..%5c" (encoded backslash) sequences or (2) filenames that match patterns in the :NondisclosureName option.
- Matched to
- Webrick 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 Webrick, across 16 versions.
None of Webrick's vulnerabilities is on the list of flaws known to be exploited today.
Create a Precursor Intelligence account and track Webrick. 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.