In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the redirect_uri parameter received during the authorization and token request is checked against an incorrect URI pattern ("[a-zA-Z][a-zA-Z0-9+.-]+:") before making a redirection. This allows a malicious client to pass an XSS payload through the redirect_uri parameter while making an authorization request. NOTE: this vulnerability is similar to CVE-2020-7741.
Published 2022-08-29 21:15:09
Updated 2022-09-07 20:15:35
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Cross site scripting (XSS)Open redirect

Exploit prediction scoring system (EPSS) score for CVE-2020-26938

0.17%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 53 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-26938

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.2
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.9
2.7
NIST

CWE ids for CVE-2020-26938

References for CVE-2020-26938

Products affected by CVE-2020-26938

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