CVE-2020-4054

Published: 16 June 2020

In Sanitize (RubyGem sanitize) greater than or equal to 3.0.0 and less than 5.2.1, there is a cross-site scripting vulnerability. When HTML is sanitized using Sanitize's "relaxed" config, or a custom config that allows certain elements, some content in a math or svg element may not be sanitized correctly even if math and svg are not in the allowlist. You are likely to be vulnerable to this issue if you use Sanitize's relaxed config or a custom config that allows one or more of the following HTML elements: iframe, math, noembed, noframes, noscript, plaintext, script, style, svg, xmp. Using carefully crafted input, an attacker may be able to sneak arbitrary HTML through Sanitize, potentially resulting in XSS (cross-site scripting) or other undesired behavior when that HTML is rendered in a browser. This has been fixed in 5.2.1.

Priority

Cvss 3 Severity Score

7.3

Score breakdown

Status

Package	Release	Status
ruby-sanitize Launchpad, Ubuntu, Debian	bionic	Needs triage
	eoan	Ignored (end of life)
	focal	Released (4.6.6-2.1~0.20.04.1)
	groovy	Not vulnerable (4.6.6-2.1)
	hirsute	Not vulnerable (4.6.6-2.1)
	impish	Not vulnerable (4.6.6-2.1)
	jammy	Not vulnerable (4.6.6-2.1)
	kinetic	Not vulnerable (4.6.6-2.1)
	lunar	Not vulnerable (4.6.6-2.1)
	mantic	Not vulnerable (4.6.6-2.1)
	noble	Not vulnerable (4.6.6-2.1)
	trusty	Does not exist
	upstream	Needs triage
	xenial	Needs triage

Severity score breakdown

Parameter	Value
Base score	7.3
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	Low
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References

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