CVE-2016-5394

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-07-19 · updated 2026-06-17
Weakness: CWE-79

Description

In the XSS Protection API module before 1.0.12 in Apache Sling, the encoding done by the XSSAPI.encodeForJSString() method is not restrictive enough and for some input patterns allows script tags to pass through unencoded, leading to potential XSS vulnerabilities.

Affected products

Apache Software Foundation Apache Sling: before 1.0.12 — fixed in 1.0.12

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Sling 1.0.12. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/99870
https://lists.apache.org/thread.html/332166037a54b97cf41e2b616aaed38439de94b19b204841478e4525%40%3Cdev.sling.apache.org%3E
http://www.securityfocus.com/bid/99870
https://lists.apache.org/thread.html/332166037a54b97cf41e2b616aaed38439de94b19b204841478e4525%40%3Cdev.sling.apache.org%3E

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