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CVE-2026-103896— 10Web Booster <= 2.34.5 - Unauthenticated Limited File Write / Cache Poisoning via Query-string Parameter Traversal in Page-Cache Path

Quick assessment

Affected
10web 10Web Booster – Website speed optimization, Cache & Page Speed optimizer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件"10Web Booster – Website speed optimization, Cache & Page Speed optimizer"（网站速度优化、缓存与页面速度优化插件）在 2.34.5 及更早版本中存在一个通过路径遍历导致的受限文件写入漏洞。该漏洞的成因在于 OptimizerWebPageCache::get_cache_file_dir() 函数将未经净化的原始 $_GET 参数名和值直接拼接到磁盘缓存路径中，而 cache_content() 函数随后对该路径调用

CVSS 7.5 · High EPSS 0.46% · P39

Affected Version Matrix 1

VendorProduct Version RangeStatus
10web 10Web Booster – Website speed optimization, Cache & Page Speed optimizer ≤ 2.34.5 affected
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I. Basic Information for CVE-2026-103896

Vulnerability Information
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Vulnerability Title
10Web Booster <= 2.34.5 - Unauthenticated Limited File Write / Cache Poisoning via Query-string Parameter Traversal in Page-Cache Path
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
10web 10Web Booster – Website speed optimization, Cache & Page Speed optimizer 0 ~ 2.34.5 -

II. Public POCs for CVE-2026-103896

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III. Intelligence Information for CVE-2026-103896

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Vendor Pages for CVE-2026-103896 (4)

Other References for CVE-2026-103896 (2)

IV. Related Vulnerabilities

Same product: 10Web Booster – Website speed optimization, Cache & Page Speed optimizer
Same vendor: 10web
Same weakness: CWE-22

V. Comments for CVE-2026-103896

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