How severe is CVE-2015-8399?

CVE-2015-8399 has a CVSS score of 4.3/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2015-8399?

Affected package information for CVE-2015-8399 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2015-8399?

No fixed version has been published for CVE-2015-8399 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2015-8399 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2015-8399, including 1 documented proof-of-concept exploit on Exploit-DB. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2015-8399?

CVE-2015-8399 has an EPSS (Exploit Prediction Scoring System) score of 93.3%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

What type of vulnerability is CVE-2015-8399?

CVE-2015-8399 is classified as Information Exposure (CWE-200). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2015-8399?

CVE-2015-8399 affects atlassian confluence. Check the affected-products list on this page against your deployed version to confirm exposure.

Is there exploit tooling available for CVE-2015-8399?

A Nuclei detection template exists for CVE-2015-8399, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2015-8399 published, and has it been updated?

CVE-2015-8399 was published on April 11, 2016 and was last updated on May 6, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2015-8399

MEDIUM

Atlassian Confluence before 5.8.17 allows remote authenticated users to read configuration files via the decoratorName parameter to (1) spaces/viewdefaultdecorator.action or (2) admin/viewdefaultdecorator.action…

Published

Apr 11, 2016

Updated

May 6, 2026

Affected

0 pkgs

Patched

None yet

Exploits

1 known

EPSS Exploitation Probability

via FIRST.org ↗

93.3%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

Affected Products

1 product · 1 configurations

Application

confluenceatlassian

≤ 5.8.16

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-39170webappsxml

Atlassian Confluence 5.2/5.8.14/5.8.15 - Multiple Vulnerabilities

by Sebastian Perez · Jan 5, 2016

Exploit-DB Source

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2015-8399 in your stack?

O3 detects CVE-2015-8399 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works