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CVE-2015-7816

27
FAUCET Score

CVE-2015-7816 describes a critical vulnerability in Piwik (now Matomo) versions prior to 2.15.0, specifically within the DisplayTopKeywords function. This flaw allows remote attackers to perform PHP object injection, Server-Side Request Forgery (SSRF), and arbitrary PHP code execution through a specially crafted HTTP header. With a CVSS score of 7.5, it represents a high-severity risk, enabling unauthenticated attackers to compromise confidentiality, integrity, and availability with low attack complexity. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.14.3CPE matchmatch criteria
cpe:2.3:a:matomo:matomo:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.93%
Probability of exploitation in next 30 days
EPSS Percentile
89.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0393 is in the 81st percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

karmainsecurity.com / KIS-2015-10
Exploit
packetstormsecurity.com / files/134220/Piwik-2.14.3-PHP-Object-Injection.html
Exploit
seclists.org / fulldisclosure/2015/Nov/15
Exploit
piwik.org / changelog/piwik-2-15-0
Vendor Advisory
securityfocus.com / archive/1/536839/100/0/threaded