CVE-2026-78318
Deferred Deferred - Pending Action

Reflected Cross-Site Scripting in Apache Syncope

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: Apache Software Foundation

Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Syncope. The notification message, as optionally shown by Console's and Enduser's login pages can be instructed to display HTML tags with unsafe JS inline, via malicious HTTP link generation. This issue affects Apache Syncope: from 4.0.4 through 4.0.7, from 4.1.0-M0 through 4.1.2. Users are recommended to upgrade to version 4.0.8 / 4.1.3, which fix this issue.

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-15
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-78318
EUVD
EUVD-2026-77439

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
apache syncope From 4.0.4 (inc) to 4.0.7 (inc)
apache syncope From 4.1.0-m0 (inc) to 4.1.2 (inc)
apache syncope 4.0.8
apache syncope 4.1.3
apache syncope From 4.1.0-M0 (inc) to 4.1.2 (inc)

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.

Attack-Flow Graph

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Executive Summary

This is a cross-site scripting (XSS) vulnerability in Apache Syncope. It occurs when user input is not properly neutralized during web page generation, allowing malicious HTML tags with unsafe JavaScript to be displayed in notification messages on login pages. Attackers could exploit this by crafting malicious HTTP links.

Detection Guidance

Check Apache Syncope versions between 4.0.4-4.0.7 and 4.1.0-M0-4.1.2. Inspect login pages for Console and Enduser for unsafe HTML/JS input in notification messages. Use tools like OWASP ZAP or Burp Suite to test for reflected XSS vulnerabilities.

Impact Analysis

An attacker could exploit this to execute arbitrary JavaScript in a victim's browser when they visit a compromised page. This may lead to session hijacking, theft of sensitive data, or defacement of the application. Users should upgrade to fixed versions (4.0.8 or 4.1.3) to mitigate the risk.

Compliance Impact

This XSS vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality requirements or HIPAA's safeguards for protected health information. Organizations must address it to maintain compliance.

Mitigation Strategies

Upgrade Apache Syncope to version 4.0.8 or 4.1.3 immediately. If upgrading is not possible, disable or restrict access to vulnerable login pages until patched.

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