CVE-2016-5124: An issue was discovered in Open-Xchange OX App Suite before 7.8.1-rev14. Adding images from external sources to HTML editors by drag&drop can potentia...

Description

An issue was discovered in Open-Xchange OX App Suite before 7.8.1-rev14. Adding images from external sources to HTML editors by drag&drop can potentially lead to script code execution in the context of the active user. To exploit this, a user needs to be tricked to use an image from a specially crafted website and add it to HTML editor areas of OX App Suite, for example E-Mail Compose or OX Text. This specific attack circumvents typical XSS filters and detection mechanisms since the code is not loaded from an external service but injected locally. Malicious script code can be executed within a user's context. This can lead to session hijacking or triggering unwanted actions via the web interface (sending mail, deleting data etc.). To exploit this vulnerability, a attacker needs to convince a user to follow specific steps (social-engineering).

Metrics

EPSS Probability

1.34%

67.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions	Update
Open-Xchange	Open-Xchange Appsuite	<= 7.8.1	Rev12

References

http://packetstormsecurity.com/files/137894/Open-Xchange-App-Suite-7.8.1-Cross-Site-Scripting.htmlThird Party Advisory, VDB Entry
http://www.securityfocus.com/archive/1/538892/100/0/threaded
http://www.securityfocus.com/bid/91775Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036296Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/137894/Open-Xchange-App-Suite-7.8.1-Cross-Site-Scripting.htmlThird Party Advisory, VDB Entry
http://www.securityfocus.com/archive/1/538892/100/0/threaded
http://www.securityfocus.com/bid/91775Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036296Third Party Advisory, VDB Entry

Timeline

Published: Dec 15, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-5124?

An issue was discovered in Open-Xchange OX App Suite before 7.8.1-rev14. Adding images from external sources to HTML editors by drag&drop can potentially lead to script code execution in the context of the active user. To exploit this, a user needs to be tricked to use an image from a specially crafted website and add it to HTML editor areas of OX App Suite, for example E-Mail Compose or OX Text. This specific attack circumvents typical XSS filters and detection mechanisms since the code is not loaded from an external service but injected locally. Malicious script code can be executed within a user's context. This can lead to session hijacking or triggering unwanted actions via the web interface (sending mail, deleting data etc.). To exploit this vulnerability, a attacker needs to convince a user to follow specific steps (social-engineering).

How severe is CVE-2016-5124?

Severity scoring for CVE-2016-5124 is pending analysis. The EPSS model estimates a 1.34% probability of exploitation in the next 30 days.

How do I fix CVE-2016-5124?

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.