CVE-2026-11747
Deferred Deferred - Pending Action

Reflected Cross-Site Scripting in Seres Software syWEB

Publication date: 2026-08-27

Last updated on: 2026-08-27

Assigner: Computer Emergency Response Team of the Republic of Turkey

Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Seres Software syWEB allows Reflected XSS. This issue affects syWEB: through 27082026. NOTE: The vendor was contacted and it was learned that the product is not supported.

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Meta Information

Published
2026-08-27
Last Modified
2026-08-27
Generated
2026-09-17
AI Q&A
2026-08-27
EPSS Evaluated
2026-09-15
NVD
CVE-2026-11747
EUVD
EUVD-2026-67134

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
seres_software syweb to 27082026 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a reflected cross-site scripting (XSS) vulnerability in Seres Software's syWEB product. It occurs when user input is improperly neutralized during web page generation, allowing malicious scripts to be executed in a victim's browser.

Detection Guidance

Detecting this reflected XSS vulnerability requires checking web application inputs for improper neutralization. Test with payloads like <script>alert(1)</script> in input fields and observe if the script executes. Use tools like Burp Suite or OWASP ZAP to intercept and modify requests.

Impact Analysis

An attacker could trick you into clicking a malicious link, which would execute arbitrary JavaScript in your browser. This could lead to theft of session cookies, account takeover, or defacement of the affected website.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, potentially violating GDPR's data protection requirements and HIPAA's security rules for protected health information.

Mitigation Strategies

Immediate mitigation includes disabling or removing the unsupported syWEB product as it is no longer maintained. If continued use is unavoidable, implement input validation and output encoding to neutralize XSS payloads. Monitor vendor updates or consider alternative solutions.

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