CVE-2016-5303

Name: CVE-2016-5303
Creator: NVD / NIST
Published: 2016-12-20T22:59:00.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.51%

Last modified Jun 17, 2026

CVE-2016-5303 is a vulnerability of currently unknown severity. Cross-site scripting (XSS) vulnerability in the Horde Text Filter API in Horde Groupware and Horde Groupware Webmail Edition before 5.2.16 allows remote attackers to inject arbitrary web script or HTML via crafted data:text/html content in a form (1) action or (2) xlink attribute.. EPSS estimates a 1.51% chance of exploitation in the next 30 days.

Description

Cross-site scripting (XSS) vulnerability in the Horde Text Filter API in Horde Groupware and Horde Groupware Webmail Edition before 5.2.16 allows remote attackers to inject arbitrary web script or HTML via crafted data:text/html content in a form (1) action or (2) xlink attribute.

Metrics

EPSS Probability

1.51%

71.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Horde	Groupware	5.2.15

References

http://marc.info/?l=horde-announce&m=147319066126665&w=2Release Notes, Third Party Advisory
http://marc.info/?l=horde-announce&m=147319089526753&w=2Release Notes, Third Party Advisory
http://www.securityfocus.com/bid/94997
https://github.com/horde/horde/commit/30d5506c20d26efbb9942fbdc6f981a0bd333b97Patch, Vendor Advisory
https://github.com/horde/horde/commit/4d8176d1e9ef5cbd2b3fcacd9b9a4c8e482fb424Patch, Vendor Advisory
http://marc.info/?l=horde-announce&m=147319066126665&w=2Release Notes, Third Party Advisory
http://marc.info/?l=horde-announce&m=147319089526753&w=2Release Notes, Third Party Advisory
http://www.securityfocus.com/bid/94997
https://github.com/horde/horde/commit/30d5506c20d26efbb9942fbdc6f981a0bd333b97Patch, Vendor Advisory
https://github.com/horde/horde/commit/4d8176d1e9ef5cbd2b3fcacd9b9a4c8e482fb424Patch, Vendor Advisory

Timeline

Published: Dec 20, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-5303?

How severe is CVE-2016-5303?

Severity scoring for CVE-2016-5303 is pending analysis. The EPSS model estimates a 1.51% probability of exploitation in the next 30 days.

How do I fix CVE-2016-5303?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-5303?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST