CVE-2020-15655
MEDIUM
6.5
CVSS Score
Published: August 10, 2020 at 05:43 PM UTC
Updated: June 17, 2026 at 02:56 AM UTC
5 products affected across 3 vendorsUbuntu LinuxFirefoxThunderbird
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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Ubuntu Linux· Canonicalrubygems
95%v < 79v < 79.0
Affected range stops below 79, so it looks safe — our inference, not a vendor statement
Affected range stops below 79.0, so it looks safe — our inference, not a vendor statement
v < 78.1
Affected range stops below 78.1, so it looks safe — our inference, not a vendor statement
v < 78.1
Affected range stops below 78.1, so it looks safe — our inference, not a vendor statement
Leap· openSUSEdrupal
95%Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (6)
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.htmlx_refsource_MISCIssue TrackingVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1645204Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4443-1/x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-30/x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-32/x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-33/CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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