CVE-2016-0956

This is a flaw that may let an outsider see information that the system should keep private. It is like a locked filing cabinet with a gap that can reveal documents without opening the drawer.

This matters to you if you run Adobe Experience Manager that uses Apache Sling’s Post component. It is a risk when the affected system can be reached remotely.

Public exploit code is available, which lowers the effort needed to attempt information theft. This is an amber-priority issue: schedule remediation promptly, especially for systems exposed to the internet.

Confirm the deployed Adobe Experience Manager release and identify the installed org.apache.sling:org.apache.sling.servlets.post version. The component target is version 2.3.8 or later; for Adobe Experience Manager installations, use the release-specific remediation in Adobe’s security bulletin rather than assuming a standalone Maven upgrade is supported.

If an immediate update is delayed, place the affected Experience Manager service behind network controls that allow only trusted users or systems, and reduce public exposure while testing the vendor update. Because the attack vectors are unspecified, validate the update in a staging environment before production deployment and review web-access logs for unexpected requests involving Sling Post endpoints or unusual access to sensitive content. CISA has not assigned a Known Exploited Vulnerabilities due date for this CVE.

CVE-2016-0956 is rated CVSS 7.5 High (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N). It is a CWE-200 information-disclosure issue in Apache Sling Servlets Post 2.3.6, with an unspecified remote attack vector. CISA KEV does not list it, so confirmed exploitation is not established by KEV; however, three public exploits are reported. EPSS predicts a 51.2% likelihood of exploitation and is rising (99th percentile).