CVE-2019-20903 Cross-site scripting in @atlaskit/editor-core
Remote attackers can inject arbitrary HTML or JavaScript via link targets in the Atlassian editor library, potentially executing code in user sessions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-20903?
CVE-2019-20903 is a medium-severity cross-site scripting vulnerability in Atlassian @atlaskit/editor-core, published on 1 Oct 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
The hyperlinks functionality in atlaskit/editor-core in before version 113.1.5 allows remote attackers to inject arbitrary HTML or JavaScript via a Cross-Site Scripting (XSS) vulnerability in link targets.
Weakness: CWE-79
Which versions are affected by CVE-2019-20903?
2 open source packages ship an affected version, including @atlaskit/editor-core. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
@atlaskit/editor-core npm | All versions | None |
@atlaskit/editor-core npm | All versions | None |
Products include Atlassian Editor-Core.
How do I fix CVE-2019-20903?
No fix has been published for CVE-2019-20903 yet. Limit exposure of the affected software until one is available.
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-2019-20903 being exploited?
There is no known exploitation of CVE-2019-20903 in the wild and no public exploit code.
Sources
Also known as GHSA-p5ch-w78f-xh44.