CVE-2023-39999: Exposure of Sensitive Information to an Unauthorized Actor in WordPress from 6.3 through 6.3.1, from 6.2 throu

Routine

MEDIUM 4.3UPGRADEMITIGATE

CVE-2023-39999 is a medium-severity flaw (CVSS 4.3) affecting wordpress, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Exposure of Sensitive Information to an Unauthorized Actor in WordPress from 6.3 through 6.3.1, from 6.2 through 6.2.2, from 6.1 through 6.13, from 6.0 through 6.0.5, from 5.9 through 5.9.7, from 5.8 through 5.8.7, from 5.7 through 5.7.9, from 5.6 through 5.6.11, from 5.5 through 5.5.12, from 5.4 through 5.4.13, from 5.3 through 5.3.15, from 5.2 through 5.2.18, from 5.1 through 5.1.16, from 5.0 through 5.0.19, from 4.9 through 4.9.23, from 4.8 th

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-200
Published	2023-10-13
Last modified	2026-10-05

Publisher (CNA): Patchstack · Vendor: fedoraproject · wordpress

Last updated 2026-10-05 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-10-13 12:15 UTCPublished CVE record published
2026-10-05 13:16 UTCUpdated Record last modified

wordpress wordpress UPGRADE

Affected: >= 4.1 and <= 4.1.38 · >= 4.2 and <= 4.2.35 · >= 4.3 and <= 4.3.31 · >= 4.4 and <= 4.4.30 · >= 4.5 and <= 4.5.29 · >= 4.6 and <= 4.6.26 · >= 4.7 and <= 4.7.26 · >= 4.8 and <= 4.8.22

Fixed in: 6.3.2

Safe to downgrade to: a release before 4.1

1. Check installed version

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

2. UPGRADE to 6.3.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wordpress

Note

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

3. If no update is available yet, DOWNGRADE to a release before 4.1 (Debian / Ubuntu)

apt-cache madison wordpress sudo apt install wordpress=<VERSION_BEFORE_4.1> sudo apt-mark hold wordpress

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list wordpress sudo dnf downgrade wordpress-<VERSION_BEFORE_4.1> sudo dnf versionlock add wordpress

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

fedoraproject fedora MITIGATE

Affected: 37 · 38

Fixed in: no fixed release known

Safe to downgrade to: a release before 37

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2023-39999?

wordpress: upgrade to 6.3.2; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-39999 being exploited?

CVE-2023-39999 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-2023-39999 affect?

CVE-2023-39999 affects wordpress, fedora. Severity is medium (CVSS 4.3). Exposure of Sensitive Information to an Unauthorized Actor in WordPress from 6.3 through 6.3.1, from 6.2 through 6.2.2, from 6.1 through 6.13, from 6.0 through 6.0.5, from 5.9 through 5.9.7, from 5.8 through 5.8.7, from 5.7 through 5.7.9, f

How urgent is CVE-2023-39999?

Priority 37/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2026-63030 CRITICAL 9.8 EXPLOITED UPGRADE WordPress Core Interpretation Conflict Vulnerability
CVE-2026-60137 MEDIUM 5.9 EXPLOITED UPGRADE WordPress Core SQL Injection Vulnerability
CVE-2026-87902 HIGH 8.1 EXPLOITED UPGRADE WordPress Core Remote File Inclusion Vulnerability
CVE-2024-4439 HIGH 7.2 UPGRADE WordPress Core is vulnerable to Stored Cross-Site Scripting via user display names in the Avatar block in vari
CVE-2024-31211 MEDIUM 5.5 UPGRADE WordPress is an open publishing platform for the Web

References

← Back to latest CVEs