CVE-2021-4428: A vulnerability has been found in what3words Autosuggest Plugin up to 4.0.0 on WordPress and classified as pro

Q: How do I fix CVE-2021-4428?

autosuggest: upgrade to 4.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-4428 being exploited?

CVE-2021-4428 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-4428 affect?

CVE-2021-4428 affects autosuggest. Severity is low (CVSS 2.7). A vulnerability has been found in what3words Autosuggest Plugin up to 4.0.0 on WordPress and classified as problematic. Affected by this vulnerability is the function enqueue_scripts of the file w3w-autosuggest/public/class-w3w-autosuggest-

Q: How urgent is CVE-2021-4428?

Priority 34/100. EPSS top 3%: very likely to be exploited

This week

LOW 2.7UPGRADE

CVE-2021-4428 is a low-severity flaw (CVSS 2.7) affecting autosuggest. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been found in what3words Autosuggest Plugin up to 4.0.0 on WordPress and classified as problematic. Affected by this vulnerability is the function enqueue_scripts of the file w3w-autosuggest/public/class-w3w-autosuggest-public.php of the component Setting Handler. The manipulation leads to information disclosure. The attack can be launched remotely. Upgrading to version 4.0.1 is able to address this issue. The patch is named d

Why this priority

EPSS top 3%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	2.7 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	15.8% (top 3%)
CISA exploited list	No
Weakness	CWE-200
Published	2023-07-18
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: what3words

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-07-18 17:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

what3words autosuggest UPGRADE

Affected: < 4.0.1

Fixed in: 4.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy autosuggest || rpm -q autosuggest || autosuggest --version

2. UPGRADE to 4.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade autosuggest

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade autosuggest

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-4428?

autosuggest: upgrade to 4.0.1. Exact commands for each OS are on this page.

Is CVE-2021-4428 being exploited?

CVE-2021-4428 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-4428 affect?

CVE-2021-4428 affects autosuggest. Severity is low (CVSS 2.7). A vulnerability has been found in what3words Autosuggest Plugin up to 4.0.0 on WordPress and classified as problematic. Affected by this vulnerability is the function enqueue_scripts of the file w3w-autosuggest/public/class-w3w-autosuggest-

How urgent is CVE-2021-4428?

Priority 34/100. EPSS top 3%: very likely to be exploited

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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