CVE-2025-10503

Reflected Cross-Site Scripting via Authentication Endpoint in WSO2 Identity Server

MEDIUM
6.1
CVSS Score
Published: April 29, 2026 at 08:08 AM UTC
Updated: October 7, 2026 at 09:10 AM UTC
1 product affected across 1 vendorIdentity Server

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

The authentication endpoint accepts user-supplied input without enforcing expected validation constraints, leading to a lack of proper output encoding. This allows for the injection of malicious JavaScript payloads, enabling reflected cross-site scripting. An attacker can leverage this vulnerability to redirect the user's browser to a malicious website, modify the user interface of the web page, retrieve information from the browser, or cause other harmful actions. However, due to the protection of session-related cookies with the httpOnly flag, session hijacking is not possible.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

7.1.0 ≤ v < 7.1.0.287.1.0
Affected range stops below 7.1.0.28, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMWSO2
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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