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Vulnerabilities

Vulnerability · CVE-2026-108587

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

Published Oct 15, 2026 · catalog updated Oct 15, 2026 · 10Web Booster – Website speed optimization, Cache & Page Speed optimizer

Check if you run it

No confirmed exploitation is on record for CVE-2026-108587. EPSS is 0.92%. Act only if a listed version of 10Web Booster – Website speed optimization, Cache & Page Speed optimizer is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.92%
Remediation
Version ranges on file
Affected products
stated 10Web Booster – Website speed optimization, Cache & Page Speed optimizer · vendor 10web 10Web Booster – Website speed optimization, Cache & Page Speed optimizer

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated 10Web Booster – Website speed optimization, Cache & Page Speed optimizer<= 2.34.10
  • vendor 10web 10Web Booster – Website speed optimization, Cache & Page Speed optimizerversion unspecified

How to fix CVE-2026-108587

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-108587. EPSS is 0.92%. Act only if a listed version of 10Web Booster – Website speed optimization, Cache & Page Speed optimizer is installed.

Which versions are affected?

Compare what you have installed with 10Web Booster – Website speed optimization, Cache & Page Speed optimizer <= 2.34.10. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-434: Unrestricted Upload of File with Dangerous Type. EPSS 0.92%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 15, 2026 · NIST NVD

    Detected

    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 make

  2. Oct 15, 2026 · NIST NVD

    Updated

    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 make

  3. Oct 15, 2026 · NIST NVD

    Updated

    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 make

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-2026-108587

    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 filter

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2026-108587

    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 filter

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-108587

    30-day exploitation probability 0.9%

    first.org
  • NIST NVDVulnerability recordCVE-2026-108587

    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 filter

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.