Medium severity · published Mar 30, 2018
CVE-2018-3741
There is a possible XSS vulnerability in all rails-html-sanitizer gem versions below 1.0.4 for Ruby
6.1
CVSS
1.3%
EPSS
No
On KEV
Description
There is a possible XSS vulnerability in all rails-html-sanitizer gem versions below 1.0.4 for Ruby. The gem allows non-whitelisted attributes to be present in sanitized output when input with specially-crafted HTML fragments, and these attributes can lead to an XSS attack on target applications. This issue is similar to CVE-2018-8048 in Loofah. All users running an affected release should either upgrade or use one of the workarounds immediately.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
Html Sanitizer · Rubyonrails
through 1.0.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-3741
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-3741
Issue Tracking
https://github.com/rails/rails-html-sanitizer/commit/f3ba1a839a35f2ba7f941c15e239a1cb379d56ae
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