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CVE-2011-0400

19
FAUCET Score

CVE-2011-0400 describes a vulnerability in Piwik (now Matomo) versions prior to 1.1, where the session cookie's secure flag was not set during HTTPS sessions. This oversight allowed attackers to potentially intercept the cookie if it was later transmitted over an unencrypted HTTP session. With a CVSS score of 5.0 (AV:N/AC:L/Au:N/C:P/I:N/A:N), it indicates a medium severity, low complexity attack with potential for information disclosure. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this decade-old vulnerability.

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

5.0MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.28%
Probability of exploitation in next 30 days
EPSS Percentile
67.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0128 is in the 47th percentile among its peer group of 23,701 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/1795
osvdb.org / 70382
piwik.org / blog/2011/01/piwik-1-1-2
Patch
exchange.xforce.ibmcloud.com / vulnerabilities/64639
securityfocus.com / bid/45787