What is CVE-2023-31664?

CVE-2023-31664 is a medium-severity vulnerability in Wso2 API Manager, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-05-23.

How severe is CVE-2023-31664?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2023-31664 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Wso2 API Manager

CVE-2023-31664

A reflected cross-site scripting (XSS) vulnerability in /authenticationendpoint/login.do of WSO2 API Manager before 4.2.0 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the tenantDomain parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-05-23 · last modified 2026-06-17.

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: 0.012 (67.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Wso2 API Manager

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

github.com/wso2/product-apim/releases/tag/v4.2.0 (Release Notes)
github.com/wso2/api-manager/issues (Issue Tracking)
github.com/adilkhan7/CVE-2023-31664 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-31664?: CVE-2023-31664 is a medium-severity vulnerability in Wso2 API Manager, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-05-23.
How severe is CVE-2023-31664?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2023-31664 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.