WP Security CheckVulnerability data as of October 17, 2026

Vulnerability alerts / October 16, 2026

Vulnerability in 10Web Booster – Website speed optimization, Cache & Page Speed optimizer — CVE-2026-103896

HighSeverity
CVSS 7.5
0.5%Estimated exploit probability
EPSS
70,000+ sitesInstalls
2.34.8Fixed in

What to do now

Update 10Web Booster – Website speed optimization, Cache & Page Speed optimizer to 2.34.8 or later.

Affected versions

  • Everything up to and including 2.34.5

Affected: 10Web Booster – Website speed optimization, Cache & Page Speed optimizer (plugin, tenweb-speed-optimizer)

Check: The plugin on wordpress.org / Our record for 10Web Booster – Website speed optimization, Cache & Page Speed optimizer

What the vulnerability is

The 10Web Booster – Website speed optimization, Cache & Page Speed optimizer plugin for WordPress is vulnerable to a limited file write via path traversal in versions up to, and including, 2.34.5 This is due to the OptimizerWebPageCache::get_cache_file_dir() function concatenating raw, unsanitized $_GET parameter names and values into the on-disk cache path, and the cache_content() sink calling mkdir() and file_put_contents() on the result with no realpath containment check — unlike the sibling delete_page_cache(), which does perform one. This makes it possible for unauthenticated attackers to create arbitrary directories (mode 0777, recursively) outside the cache root and write a cached page into them. The write is LIMITED: the filename is always 'source.html', so the extension is fixed, and the content is the rendered page buffer rather than attacker-supplied data. PHP files cannot be written and code execution is not possible; the demonstrated impact is cache poisoning and arbitrary directory creation.

This description is reproduced verbatim from the public vulnerability record.

Sources

This page is compiled automatically from public databases. Accuracy is not guaranteed; confirm against the vendor advisory before acting.

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