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CVE-2011-0398

20
FAUCET Score

CVE-2011-0398 describes an IP address spoofing vulnerability in Piwik (now Matomo) versions prior to 1.1. The Piwik_Common::getIP function fails to accurately determine the client's IP, allowing attackers to bypass geolocation and logging by using private IP addresses behind proxies or spoofing the X-Forwarded-For header. This vulnerability has a CVSS score of 6.4 (Medium), indicating it can be exploited remotely with low complexity to impact confidentiality and integrity (C:P/I:P). There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.0CPE matchmatch criteria
cpe:2.3:a:matomo:matomo:*:*:*:*:*:*:*:*
0.1CPE matchmatch criteria
cpe:2.3:a:matomo:matomo:0.1:*:*:*:*:*:*:*
0.1.1CPE matchmatch criteria
cpe:2.3:a:matomo:matomo:0.1.1:*:*:*:*:*:*:*
0.1.2CPE matchmatch criteria
cpe:2.3:a:matomo:matomo:0.1.2:*:*:*:*:*:*:*
0.1.3CPE matchmatch criteria
cpe:2.3:a:matomo:matomo:0.1.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.4MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.34%
Probability of exploitation in next 30 days
EPSS Percentile
68.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0134 is in the 49th percentile among its peer group of 23,705 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

dev.piwik.org / trac/ticket/567
osvdb.org / 70384
piwik.org / blog/2011/01/piwik-1-1-2
Patch
exchange.xforce.ibmcloud.com / vulnerabilities/64641
securityfocus.com / bid/45787