Vulnerability Details : CVE-2019-20437
Potential exploit
An issue was discovered in WSO2 API Manager 2.6.0, WSO2 IS as Key Manager 5.7.0, and WSO2 Identity Server 5.8.0. When a custom claim dialect with an XSS payload is configured in the identity provider basic claim configuration, that payload gets executed, if a user picks up that dialect's URI as the provisioning claim in the advanced claim configuration of the same Identity Provider. The attacker also needs to have privileges to log in to the management console, and to add and update identity provider configurations.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2019-20437
- cpe:2.3:a:wso2:identity_server:5.7.0:*:*:*:*:*:*:*
- cpe:2.3:a:wso2:identity_server:5.8.0:*:*:*:*:*:*:*
- cpe:2.3:a:wso2:api_manager:2.6.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-20437
1.10%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 77 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-20437
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
MITRE | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2019-20437
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-20437
-
https://docs.wso2.com/display/Security/Security+Advisory+WSO2-2019-0635
Security Advisory WSO2-2019-0635 - WSO2 Platform Security - WSO2 DocumentationVendor Advisory
-
https://cybersecurityworks.com/zerodays/cve-2019-20437-wso2.html
CVE-2019-20437 - Stored Cross-Site Scripting (XSS) in WSO2 ProductExploit;Third Party Advisory
-
https://github.com/cybersecurityworks/Disclosed/issues/20
Stored Cross Site Scripting (XSS) in "malicious dialect URI" on WSO2 Product - (WSO2 Identity Server version 5.7.0) · Issue #20 · cybersecurityworks/Disclosed · GitHubExploit;Third Party Advisory
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