CVE-2019-11711
If pages on different subdomains ever cooperatively use document.domain, then either page can abuse this to inject script into arbitrary pages on the other subdomain, even those that did not use document.domain to relax their origin security.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
When an inner window is reused, it does not consider the use of document.domain for cross-origin protections. If pages on different subdomains ever cooperatively use document.domain, then either page can abuse this to inject script into arbitrary pages on the other subdomain, even those that did not use document.domain to relax their origin security. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.63% probability · 76th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- mozilla/firefox · mozilla/thunderbird · debian/debian linux
- Source
- security@mozilla.org
EPSS 1.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.htmlBroken Link
- https://bugzilla.mozilla.org/show_bug.cgi?id=1552541Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00001.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00002.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201908-12Third Party Advisory
- https://security.gentoo.org/glsa/201908-20Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-22/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-23/Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.htmlBroken Link
- https://bugzilla.mozilla.org/show_bug.cgi?id=1552541Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00001.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00002.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201908-12Third Party Advisory
- https://security.gentoo.org/glsa/201908-20Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-22/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-23/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.