CVE-2020-4054 Cross-site Scripting in Sanitize
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2020-4054?
CVE-2020-4054 is a high-severity vulnerability in rgrove Sanitize, published on 16 Jun 2020.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2020-4054?
2 open source packages ship an affected version, including sanitize. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
sanitize RubyGems | From 3.0.0 | 5.2.1 |
sanitize RubyGems | From 3.0.0 | 5.2.1 |
Products include Sanitize Project Sanitize.
How do I fix CVE-2020-4054?
Upgrade sanitize to 5.2.1 or later.
Is CVE-2020-4054 being exploited?
There is no known exploitation of CVE-2020-4054 in the wild and no public exploit code.
Other vulnerabilities in rgrove Sanitize
Sources
Also known as DEBIAN-CVE-2020-4054, DSA-4730-1, GHSA-p4x4-rw2p-8j8m, UBUNTU-CVE-2020-4054, USN-4543-1.