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CVE-2019-11761

MEDIUM
5.4
CVSS Score
Published: January 8, 2020 at 07:52 PM UTC
Updated: June 17, 2026 at 02:13 AM UTC
4 products affected across 2 vendorsUbuntu LinuxFirefoxThunderbird

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.8%

Description

By using a form with a data URI it was possible to gain access to the privileged JSONView object that had been cloned into content. Impact from exposing this object appears to be minimal, however it was a bypass of existing defense in depth mechanisms. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
16.04
Firefox· Mozilla
95%
v < 70v < 70.0
Affected range stops below 70, so it looks safe — our inference, not a vendor statement
Affected range stops below 70.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
95%
v < 68.2
Affected range stops below 68.2, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 68.2
Affected range stops below 68.2, so it looks safe — our inference, not a vendor statement

References (6)

x_refsource_CONFIRMIssue TrackingPermissions Required
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1561502
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202003-10
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4335-1/
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2019-33/
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2019-34/
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2019-35/

CVSS

5.4MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-362CWE-862

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