CVE-2019-20903

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-10-01 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

Atlassian @atlaskit/editor-core: before 113.1.5 — fixed in 113.1.5

How to fix

Upgrade to a fixed version: Atlassian @atlaskit/editor-core 113.1.5. Check the vendor advisory for mitigations.

References

https://atlaskit.atlassian.com/packages/editor/editor-core/changelog/113.1.5
https://confluence.atlassian.com/pages/viewpage.action?pageId=1021244735
https://www.npmjs.com/package/%40atlaskit/editor-core
https://atlaskit.atlassian.com/packages/editor/editor-core/changelog/113.1.5
https://confluence.atlassian.com/pages/viewpage.action?pageId=1021244735
https://www.npmjs.com/package/%40atlaskit/editor-core

Get alerted when CVE-2019-20903 or the next vulnerability affects your stack