CVE-2026-108587 10Web Booster <= 2.34.10 - Unauthenticated Arbitrary File Upload via 'page_id' Parameter
Unauthenticated attackers can upload executable files via the page_id parameter if a specific nonce is leaked, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-108587?
CVE-2026-108587 is a critical vulnerability in 10Web Booster – Website speed optimization, Cache & Page Speed optimizer, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-434
Which versions are affected by CVE-2026-108587?
How do I fix CVE-2026-108587?
No fix has been published for CVE-2026-108587 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-108587 being exploited?
There is no known exploitation of CVE-2026-108587 in the wild and no public exploit code.
Sources
Also known as GHSA-38rr-wcwh-jgw6.