CVE-2020-6798

MEDIUM
6.1
CVSS Score
Published: March 2, 2020 at 04:05 AM UTC
Updated: June 17, 2026 at 03:23 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity
MEDIUM6.1
Exploit prediction
EPSS 2%

Description

If a template tag was used in a select tag, the parser could be confused and allow JavaScript parsing and execution when it should not be allowed. A site that relied on the browser behaving correctly could suffer a cross-site scripting vulnerability as a result. In general, this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but is potentially a risk in browser or browser-like contexts. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5.

Affected

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

v < 73v < ESR68.5
Affected range stops below 73, so it looks safe — our inference, not a vendor statement
Affected range stops below 73.0, so it looks safe — our inference, not a vendor statement
Affected range stops below ESR68.5, so it looks safe — our inference, not a vendor statement
v < 68.5.0
Affected range stops below 68.5.0, so it looks safe — our inference, not a vendor statement
v < 68.5
Affected range stops below 68.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 68.5.0, 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:

References (9)

Vendor Advisoryx_refsource_GENTOO
https://security.gentoo.org/glsa/202003-02
Vendor Advisoryx_refsource_GENTOO
https://security.gentoo.org/glsa/202003-10
Vendor Advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4278-2/
Vendor Advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4328-1/
Vendor Advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4335-1/

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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