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CVE-2018-20744

21
FAUCET Score

CVE-2018-20744 describes a vulnerability in the Olivier Poitrey Go CORS handler (go_cors_project go_cors) up to version 1.3.0. This flaw allows the handler to incorrectly convert a wildcard CORS policy into one that reflects an arbitrary Origin header, leading to potential CORS misconfiguration security issues. The vulnerability has a CVSS score of 5.9 (Medium), indicating a network-based attack with high impact to integrity and high attack complexity, but no impact to confidentiality or availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.0CPE matchmatch criteria
cpe:2.3:a:go_cors_project:go_cors:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.72%
Probability of exploitation in next 30 days
EPSS Percentile
50.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 10th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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 (2)

gopatch availablevia ghsa
Product: github.com/gofiber/fiber/v2Fixed in: 2.43.0
gopatch availablevia ghsa
Product: github.com/rs/corsFixed in: 1.5.0

Vendor Advisories (1)

goGHSA-927h-x4qj-r242medium

github.com/gofiber/fiber/v2 vulnerable to Origin Validation Error

May 14, 2022

References

github.com / rs/cors/issues/55
Issue TrackingThird Party Advisory
usenix.org / system/files/conference/usenixsecurity18/sec18-chen.pdf
Third Party Advisory
securityfocus.com / bid/106834
Third Party Advisory