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CVE-2017-0356

31
FAUCET Score

CVE-2017-0356 is a critical authentication bypass vulnerability in ikiwiki versions prior to 3.20170111, specifically within the passwordauth plugin's use of CGI::FormBuilder. An attacker can exploit this flaw by submitting repeated parameters, effectively bypassing authentication. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network with low complexity, requiring no user interaction, and can lead to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, with 10 mentions indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.20170111CPE matchmatch criteria
cpe:2.3:a:ikiwiki:ikiwiki:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.46%
Probability of exploitation in next 30 days
EPSS Percentile
87.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0346 is in the 80th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ikiwiki.info / security
Vendor Advisory
marc.info
ExploitThird Party Advisory
debian.org / security/2017/dsa-3760
Third Party Advisory
securityfocus.com / bid/95420
Third Party AdvisoryVDB Entry