CVE-2019-11720

critical

Published — · Modified —

CVSS v3

—

CVSS v2

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VIR risk

9.5

Description

Some unicode characters are incorrectly treated as whitespace during the parsing of web content instead of triggering parsing errors. This allows malicious code to then be processed, evading cross-site scripting (XSS) filtering. This vulnerability affects Firefox < 68.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2019-11720

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201907-4

OS impact

OS	Version	Status	Fixed in
arch		fixed	`68.0-1`
debian	sid	fixed	`68.0-1`

References

https://security.archlinux.org/ASA-201907-4
https://security-tracker.debian.org/tracker/CVE-2019-11720

Verify integrity in audit chain (admin only). AS-IS.