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CVE-2007-0539: The wp_remote_fopen function in WordPress before 2.1 allows remote attackers to cause a denial of service (bandwidth or thread consumption) via pingback service calls with a source URI that correspond

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

The wp_remote_fopen function in WordPress before 2.1 allows remote attackers to cause a denial of service (bandwidth or thread consumption) via pingback service calls with a source URI that correspond

Package
WordPress core WordPress
Affected versions
<=2.0
Fixed in
no fix recorded
Severity
high  CVSS 7.8
Exploitation
not on CISA KEV · EPSS 4% (89.4th percentile)
Published
2007-01-29
Source
nvd

References

NVD recordWordPress core advisories

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# 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.

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