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CVE-2011-5098

21
FAUCET Score

CVE-2011-5098 describes an access control bypass vulnerability in Chef Server versions prior to 0.9.20 and 0.10.6. This flaw allows remote authenticated users with read permission for the validation key to create administrative clients without requiring administrative privileges, effectively bypassing intended security restrictions. The vulnerability has a CVSS score of 6.5, indicating a medium severity with a network attack vector, low attack complexity, and potential for partial confidentiality, integrity, and availability impact. 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
<= 0.9.18CPE matchmatch criteria
cpe:2.3:a:opscode:chef:*:*:*:*:*:*:*:*
0.5.1CPE matchmatch criteria
cpe:2.3:a:opscode:chef:0.5.1:*:*:*:*:*:*:*
0.5.2CPE matchmatch criteria
cpe:2.3:a:opscode:chef:0.5.2:*:*:*:*:*:*:*
0.5.4CPE matchmatch criteria
cpe:2.3:a:opscode:chef:0.5.4:*:*:*:*:*:*:*
0.5.6CPE matchmatch criteria
cpe:2.3:a:opscode:chef:0.5.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.5MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.68%
Probability of exploitation in next 30 days
EPSS Percentile
74.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0168 is in the 88th percentile among its peer group of 21,939 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / opscode/chef/commit/33f0e9c58bbf047e1b401a834f3abfe72d9a8947
ExploitPatch
tickets.opscode.com / browse/CHEF-2649