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CVE-2021-4428

32
FAUCET Score

CVE-2021-4428 is an information disclosure vulnerability affecting the what3words Autosuggest Plugin for WordPress, specifically versions up to 4.0.0. This flaw resides in the enqueue_scripts function within the w3w-autosuggest/public/class-w3w-autosuggest-public.php file, allowing remote attackers to extract sensitive information. With a CVSS v3.1 score of 7.5 (HIGH), it presents a significant risk due to its network-based attack vector and low attack complexity, leading to high confidentiality impact without requiring user interaction. While the vulnerability has a high EPSS and FAUCET Risk Score, indicating its potential for exploitation, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage. Organizations are advised to upgrade to version 4.0.1 to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.0.1CPE matchmatch criteria
cpe:2.3:a:what3words:autosuggest:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

2.7LOW

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
15.81%
Probability of exploitation in next 30 days
EPSS Percentile
96.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1581 is in the 95th percentile among its peer group of 51,551 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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 / what3words/wordpress-autosuggest-plugin/commit/dd59cbac5f86057d6a73b87007c08b8bfa0c32ac
Patch
github.com / what3words/wordpress-autosuggest-plugin/pull/20
PatchVendor Advisory
github.com / what3words/wordpress-autosuggest-plugin/releases/tag/v4.0.1
Release Notes
vuldb.com
Permissions Required
vuldb.com
Permissions Required