What this actually is.
Technical background, root cause, and affected surface.
An issue was discovered in WSO2 API Manager 2.6.0. If there is a claim dialect configured with an XSS payload in the dialect URI, that payload gets executed if the user accesses the My Account page.
- Vendor
- WSO2
- Affected Product
- WSO2
- CVE
- CVE-2019-20436
- Securin ID
- 2019-CSW-11-1029
- Status
- Fixed
- Date
- June 25, 2019
- Severity
- Medium
- CVSS Score
- 6.1
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CWE
- CWE-79
From one request
to root shell.
Reproduced in a sandboxed environment. Requires only LAN or WiFi adjacency.
The POST request dialect variable is vulnerable to stored Cross-Site Scripting (XSS) in the URL, https://localhost:9443/carbon/identity-claim-mgt/add-dialect-finish-ajaxprocessor.jsp
What an attacker does to you.
Post-exploitation outcomes mapped to CVSS impact metrics.
Through an XSS attack, the attacker can make the browser redirect to a malicious website. Unauthorized actions such as changing the UI of the web page, retrieving information from the browser are possible. But since all session-related sensitive cookies are set with httpOnly flat and protected, session hijacking or mounting a similar attack would not be possible.
Fix it. In this order.
A runbook, not a checklist. Sequence matters — assume compromise before you act.
Download the relevant patch based on the product version.
disclose@securin.ioVendors moved in days.
Attackers in hours.
Reconstructed from vendor advisories, CISA bulletins, and Securin research records.
Discovered in WS02 Identity Server 5.7.0 Version
Report sent to WS02.
WS02 acknowledged the report
Fixing began in all affected versions
The vendor informed their customers about the vulnerability.
Public announcement by the vendor about the vulnerability.
Timeline recorded · Disclosure coordinated by Securin
Cite, verify, go deeper.
Primary sources — NVD, CISA KEV, and machine-readable IoC feed.