CVE-2020-13973 Cross-site scripting in json-sanitizer
An attacker can inject malicious JavaScript into web pages by exploiting a parser confusion flaw in the OWASP json-sanitizer library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-13973?
CVE-2020-13973 is a medium-severity cross-site scripting vulnerability in n/a, published on 9 Jun 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
OWASP json-sanitizer before 1.2.1 allows XSS. An attacker who controls a substring of the input JSON, and controls another substring adjacent to a SCRIPT element in which the output is embedded as JavaScript, may be able to confuse the HTML parser as to where the SCRIPT element ends, and cause non-script content to be interpreted as JavaScript.
Weakness: CWE-79
Which versions are affected by CVE-2020-13973?
2 open source packages ship an affected version, including com.mikesamuel:json-sanitizer. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
com.mikesamuel:json-sanitizer Maven | All versions | 1.2.1 |
com.mikesamuel:json-sanitizer Maven | All versions | 1.2.1 |
Products include Owasp Json-Sanitizer.
How do I fix CVE-2020-13973?
Upgrade com.mikesamuel:json-sanitizer to 1.2.1 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2020-13973 being exploited?
There is no known exploitation of CVE-2020-13973 in the wild and no public exploit code.
Public exploit code: 2 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as GHSA-g8jj-899q-8x3j.