CVE-2020-15652

Q: How do I fix CVE-2020-15652?

Published advisories record a fix for 6 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Q: Is CVE-2020-15652 being actively exploited?

Not that we know of. CVE-2020-15652 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 68% of all scored CVEs.

Q: How severe is CVE-2020-15652?

CVE-2020-15652 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2020-15652 affect?

Published advisories record a fix for firefox (Debian), firefox (Ubuntu), DeveloperEdition (Windows application), Mozilla Firefox (en-US) (Windows application), and 2 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

6.5

CVSS v3

NVD

Description

By observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect. This applied only to content that can be parsed as script. This vulnerability affects Firefox < 79, Firefox ESR < 68.11, Firefox ESR < 78.1, Thunderbird < 68.11, and Thunderbird < 78.1.

CWE-346

How to fix

Remediation Available

firefoxDebian

Fixed in:79.0-1CVE-2020-15652

firefoxUbuntu

Fixed in:79.0+build1-0ubuntu0.16.04.2USN-4443-1

Fixed in:79.0+build1-0ubuntu0.18.04.1USN-4443-1

Fixed in:79.0+build1-0ubuntu0.20.04.1USN-4443-1

DeveloperEditionWindows application

Affected:78.0 78.1Fixed in:78.1Mozilla

Affected:79.0Fixed in:79.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:79.0Fixed in:79.0Mozilla

Affected:78.0 78.1Fixed in:78.1Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:68.11Fixed in:68.11Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:78.0 78.1Fixed in:78.1Mozilla

Affected:68.11Fixed in:68.11Mozilla

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploit Intelligence

1.26%probability of exploitation in 30 days

68thpercentile

Moderate risk: more likely to be exploited than 68% of all known CVEs.

References

Vendor Advisory6

Third-Party Advisory3

Other references1

lists.opensuse.org

Related Vulnerabilities

Other CWE-346 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-34291	High	8.8	84%	KEV	-
CVE-2009-1185	High	7.2	82%	-	Fix
CVE-2015-4495	High	8.8	71%	KEV	Fix
CVE-2020-16952	High	8.6	71%	-	-
CVE-2023-29711	Critical	9.8	70%	-	-
CVE-2024-23898	High	8.8	67%	-	Fix

Common questions

How do I fix CVE-2020-15652?

Published advisories record a fix for 6 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2020-15652 being actively exploited?

Not that we know of. CVE-2020-15652 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 68% of all scored CVEs.

How severe is CVE-2020-15652?

CVE-2020-15652 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2020-15652 affect?

Published advisories record a fix for firefox (Debian), firefox (Ubuntu), DeveloperEdition (Windows application), Mozilla Firefox (en-US) (Windows application), and 2 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.