CVE-2016-4856 Cross-site scripting in Splunk Enterprise
An administrator can inject arbitrary web script or HTML into Splunk Enterprise, potentially leading to code execution or security bypass.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2016-4856?
CVE-2016-4856 is a medium-severity cross-site scripting vulnerability in Splunk Splunk, published on 12 May 2017. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Cross-site scripting vulnerability in Splunk Enterprise 6.3.x prior to 6.3.5 and Splunk Light 6.3.x prior to 6.3.5 allows attacker with administrator rights to inject arbitrary web script or HTML via unspecified vectors.
Weakness: CWE-79
Which versions are affected by CVE-2016-4856?
It affects 1 product.
Products include Splunk Splunk.
How do I fix CVE-2016-4856?
No fix has been published for CVE-2016-4856 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2016-4856 being exploited?
There is no known exploitation of CVE-2016-4856 in the wild and no public exploit code.
Other vulnerabilities in Splunk Splunk
- CVE-2026-20253 Splunk Enterprise Missing Authentication for Critical Function
- CVE-2026-76268 Missing Authentication for Critical Function in the Patroni REST API in Splunk Enterprise
- CVE-2026-76284 Improper Neutralization in Splunk Enterprise
- CVE-2026-76285 Improper Adherence to Coding Standards in Splunk Enterprise
- CVE-2017-17067 Auth bypass in n/a
Sources
Also known as GHSA-35rm-gh88-rf95.