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Vulnerability details

CVE-2026-108587

10web Booster – Website speed optimization

10Web Booster <= 2.34.10 - Unauthenticated Arbitrary File Upload via 'page_id' Parameter

CVSS 3.1
9.8Critical

Official description

The 10Web Booster – Website speed optimization, Cache & Page Speed optimizer plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.34.10 via the compressCustom function. This is due to missing file type validation and extension filtering on the page_id parameter, combined with a world-readable leaked nonce that bypasses authentication checks. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. This exploit chain requires obtaining the plugin's REST nonce (tenwebio_rest), which is automatically serialized to a world-readable file under wp-content/uploads/ whenever a bulk optimisation batch pauses; because the nonce is generated in a cron/loopback context with a user ID of 0, it is valid for unauthenticated visitors.

CVSS scores

ScoreVersionSourceVector
9.8Critical 3.1 CVEProject cvelistV5 (CNA) (Wordfence) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

VendorProductVersionsSource
10web 10Web Booster – Website speed optimization, Cache & Page Speed optimizer v ≤ 2.34.10 CVEProject cvelistV5 (CNA)

References and advisories

12
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Details

Published
2026-10-15
Last updated
2026-10-15
State
Published
Assigner (CNA)
Wordfence
Kolun priority
30 · Low

Exploit prediction (EPSS)

0.91%
Probability of exploitation in 30 days
60.3%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-434
    Unrestricted Upload of File with Dangerous Type