CVE-2020-15655

Description

A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

6.5

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.21%

Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org

Affected: Mozilla Firefox ESR

Affected: Mozilla Firefox

Affected: Mozilla Thunderbird

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2020-30/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2020-32/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2020-33/	vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1645204	issue tracking vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html	mailing list third party advisory vendor advisory
https://usn.ubuntu.com/4443-1/	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-15655?: CVE-2020-15655 has been scored as a medium severity vulnerability.
How to fix CVE-2020-15655?: To fix CVE-2020-15655, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-15655 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2020-15655 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-15655?: CVE-2020-15655 affects Mozilla Firefox ESR, Mozilla Firefox, Mozilla Thunderbird.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.