CVE-2025-10503: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in WSO2 WSO2 Identity Server
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.
AI Analysis
Technical Summary
WSO2 Identity Server 7.1.0 contains a reflected XSS vulnerability (CWE-79) in its authentication endpoint due to improper input validation and output encoding. This flaw allows attackers to inject malicious JavaScript that executes in the context of the victim's browser. While the vulnerability can be used to redirect users or manipulate the web interface, session cookies are protected with the httpOnly flag, preventing session hijacking. The CVSS 3.1 base score is 6.1 (medium), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and partial impact on confidentiality and integrity.
Potential Impact
Successful exploitation can result in execution of arbitrary JavaScript in the victim's browser, enabling actions such as redirecting the user to malicious sites, altering the user interface, or extracting information accessible to the browser. However, session hijacking is not possible due to the httpOnly flag on session cookies. The impact is limited to confidentiality and integrity with no availability impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider applying any recommended temporary mitigations from WSO2 or restrict access to the affected authentication endpoint. Monitor vendor communications for updates on patches or official mitigations.
CVE-2025-10503: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in WSO2 WSO2 Identity Server
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.
CVSS v3.1
Score 6.1medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
WSO2 Identity Server 7.1.0 contains a reflected XSS vulnerability (CWE-79) in its authentication endpoint due to improper input validation and output encoding. This flaw allows attackers to inject malicious JavaScript that executes in the context of the victim's browser. While the vulnerability can be used to redirect users or manipulate the web interface, session cookies are protected with the httpOnly flag, preventing session hijacking. The CVSS 3.1 base score is 6.1 (medium), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and partial impact on confidentiality and integrity.
Potential Impact
Successful exploitation can result in execution of arbitrary JavaScript in the victim's browser, enabling actions such as redirecting the user to malicious sites, altering the user interface, or extracting information accessible to the browser. However, session hijacking is not possible due to the httpOnly flag on session cookies. The impact is limited to confidentiality and integrity with no availability impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider applying any recommended temporary mitigations from WSO2 or restrict access to the affected authentication endpoint. Monitor vendor communications for updates on patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WSO2
- Date Reserved
- 2025-09-16T04:58:57.289Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f1c306cbff5d8610dc3623
Added to database: 4/29/2026, 8:36:22 AM
Last enriched: 4/29/2026, 8:52:31 AM
Last updated: 6/13/2026, 12:55:27 PM
Views: 78
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.