phpwarden
FeaturesComparePricingAdvisoriesBlogDocsChangelogLog in
Log inStart free

CVE-2023-39999: 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

medium Affects WordPress core. Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

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

Package
WordPress core WordPress
Affected versions
>=4.1 and <=4.1.38 or >=4.2 and <=4.2.35 or >=4.3 and <=4.3.31 or >=4.4 and <=4.4.30 or >=4.5 and <=4.5.29 or >=4.6 and <=4.6.26 or >=4.7 and <=4.7.26 or >=4.8 and <=4.8.22 or >=4.9 and <=4.9.23 or >=5.0 and <=5.0.19 or >=5.1 and <=5.1.16 or >=5.2 and <=5.2.18 or >=5.3 and <=5.3.15 or >=5.4 and <=5.4.13 or >=5.5 and <=5.5.12 or >=5.6 and <=5.6.11 or >=5.7 and <=5.7.9 or >=5.8 and <=5.8.7 or >=5.9 and <=5.9.7 or >=6.0 and <=6.0.5 or >=6.1 and <=6.1.3 or >=6.2 and <=6.2.2 or >=6.3 and <6.3.2
Fixed in
6.3.2
Severity
medium  CVSS 4.3
Exploitation
not on CISA KEV · EPSS 1% (67.9th percentile)
Published
2023-10-13
Source
nvd

References

CWE-200
NVD recordWordPress core advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden wordpress /var/www/html

# or, without Composer
pipx install phpwarden   &&   phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs   How findings are ranked

Related advisories