Quick answers
- Is This vulnerability exploited in the wild?
- No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
- How severe is This vulnerability?
- Low severity, with a CVSS score of 3.1, published 3 September 2020.
- Which products and versions are affected?
- quill (npm) SEMVER:introduced=0,fixed=1.3.7.
- Is there a fix for This vulnerability?
- Yes. quill (npm): upgrade to 1.3.7 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is This vulnerability attacked?
- It is attacked over the network, in a software library.
- Am I affected?
- Check whether you run quill (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- quill (npm): upgrade to 1.3.7 or later
npm install quill@1.3.7
Technical details
This is a reverse tabnabbing vulnerability (CWE-1022) in the anchor tag creation logic of Quill's link format handler. When Quill renders links with target="_blank", it fails to set the rel="noopener noreferrer" attribute, which normally prevents the opened page from accessing the window.opener object. An attacker-controlled destination page can use window.opener to redirect the original tab to a malicious phishing page. The vulnerability is exploitable in both normal editing mode and read-only display mode where users click embedded links. No user privilege or authentication is required; only user interaction (clicking a link) is needed. The fix involves adding rel="noopener noreferrer" to anchor tags created by the formats/link.js module. Version 1.3.7 and later contain the patch.
Affected products
- Quill Quill < 1.3.7
Timeline
- 2020-09-03: disclosed