CVE-2019-12184 — There is XSS in browser/components/MarkdownPreview

There is XSS in browser/components/MarkdownPreview.js in BoostIO Boostnote 0.11.15 via a label named flowchart, sequence, gallery, or chart, as demonstrated by a crafted SRC attribute of an IFRAME element, a different vulnerability than CVE-2019-12136.

01What is this vulnerability?

There is XSS in browser/components/MarkdownPreview.js in BoostIO Boostnote 0.11.15 via a label named flowchart, sequence, gallery, or chart, as demonstrated by a crafted SRC attribute of an IFRAME element, a different vulnerability than CVE-2019-12136.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

08Timeline

• Published: 2019-05-19T19:00:19.000Z
• Last modified: 2024-08-04T23:10:30.901Z

09References

• gist.github.com — https://gist.github.com/rebirthwyw/9836b2445abd4c1358e3d68ff2415247