XSS in Wso2 API Manager
CVE-2019-20437
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 class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.013 (69.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Wso2 API Manager — versions 2.6.0
- Wso2 Identity Server — versions 5.7.0, 5.8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- docs.wso2.com/display/Security/Security+Advisory+WSO2-2019-0635 (Vendor Advisory)
- github.com/cybersecurityworks/Disclosed/issues/20 (Exploit, Third Party Advisory)
- cybersecurityworks.com/zerodays/cve-2019-20437-wso2.html (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-20437?
- CVE-2019-20437 is a medium-severity vulnerability in Wso2 API Manager, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-01-28.
- How severe is CVE-2019-20437?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2019-20437 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.