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CVE-2020-15669

HIGH
8.8
CVSS Score
Published: October 1, 2020 at 06:42 PM UTC
Updated: June 17, 2026 at 02:57 AM UTC
2 products affected across 1 vendorThunderbirdFirefox ESR

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Severity
HIGH8.8
Exploit prediction
EPSS 1%

Description

When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.

Affected

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

Firefox ESR· Mozilla
95%
v < 68.12
Affected range stops below 68.12, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 68.12
Affected range stops below 68.12, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCIssue TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1656957
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-37/
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-40/

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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