CVE-2019-11717

Exp

A vulnerability exists where the caret ("^") character is improperly escaped constructing some URIs due to it being used as a separator, allowing for possible spoofing of origin attributes. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

Published: 2019-07-23 Last update: 2025-11-25 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-11717 is rated High Exploit Risk (63/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.13%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2019-11717

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-11717

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 3.19% 2.13% -1.06%
2 2026-05-30 4.60% 3.19% -1.41%
3 2026-05-08 — 4.60% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-11717

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2019-11717

OS Trackers for CVE-2019-11717

vendor priority summary link
alpine — CVE-2019-11717: 1 source package rows (firefox-esr); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2019-11717
debian not yet assigned CVE-2019-11717 not yet assigned priority: Debian including 3 source packages (firefox, firefox-esr, thunderbird), 11 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 11. https://security-tracker.debian.org/tracker/CVE-2019-11717
gentoo normal CVE-2019-11717: 2 GLSA(s) (201908-12, 201908-20), 4 atom(s) (mail-client/thunderbird, mail-client/thunderbird-bin, www-client/firefox, www-client/firefox-bin); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2019-11717
redhat medium — https://access.redhat.com/security/cve/CVE-2019-11717
suse high CVE-2019-11717 severity important: SUSE including 238 source package names (1.0.0.1862.1.5.2:libfreebl3-3.44.1-3.16.2, 1.0.0.1862.1.5.2:libsoftokn3-3.44.1-3.16.2, …), 928 product×package rows across 121 product lines (Container bci/openjdk, Container bci/openjdk-devel, … (121 product lines)): Fixed 928. https://www.suse.com/security/cve/CVE-2019-11717/
ubuntu medium CVE-2019-11717 medium priority: Ubuntu including 5 source packages (firefox, mozjs38, mozjs52, mozjs60, thunderbird), 80 status rows across 16 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, trusty, upstream, xenial): DNE 37, released 30, ignored 13. https://ubuntu.com/security/CVE-2019-11717

Affected software / configurations for CVE-2019-11717

Vendor Product Version Raw CPE
mozilla firefox < 60.8.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla firefox < 68.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla thunderbird < 60.8.0 cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
novell suse_package_hub_for_suse_linux_enterprise 12 cpe:2.3:a:novell:suse_package_hub_for_suse_linux_enterprise:12:*:*:*:*:*:*:*
opensuse leap 15.0 cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
opensuse leap 15.1 cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

References for CVE-2019-11717

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1548306 Exploit Issue Tracking Vendor Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00001.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00002.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/201908-12 Third Party Advisory
https://security.gentoo.org/glsa/201908-20 Third 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
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