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CVE-2026-83627— WordPress Hummingbird Performance 代码注入漏洞

一分钟漏洞结论

影响对象
wpmudev Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

WordPress Hummingbird Performance是WordPress基金会开源的一款网站性能优化插件。 WordPress Hummingbird Performance 3.21.0及之前版本存在代码注入漏洞，该漏洞源于log_msg()函数在写入页面缓存调试日志时未对Cookie参数进行清理，且防护头部检查被绕过，可能导致未经身份验证的攻击者向日志文件写入并执行任意PHP代码，实现远程代码执行。

CVSS 9.8 · Critical EPSS 1.43% · P73
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一、 漏洞 CVE-2026-83627 基础信息

漏洞信息
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Vulnerability Title
Hummingbird – Speed Optimization, Caching, Minify, Compress & CDN <= 3.21.0 - Unauthenticated Remote Code Execution via Cookie Name in Page Cache Debug Log
来源: CVE Program / CVE List V5
Vulnerability Description
The Hummingbird – Speed Optimization, Caching, Minify, Compress & CDN plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 3.21.0 via the log_msg() function in core/modules/class-page-cache.php. The page-cache debug log is written to wp-content/wphb-logs/page-caching-log.php, a directly web-accessible PHP file that is supposed to be protected by a leading '<?php die(); ?>' header. That header is guarded by class_exists( 'Filesystem' ), which can never match because class_exists() resolves string arguments in the global namespace while the class is Hummingbird\Core\Filesystem; when the log is created during a front-end request the header is therefore omitted entirely. get_cookies() then writes the raw name of any cookie matching the wphb_cache_ prefix into that file without sanitization. This makes it possible for unauthenticated attackers to write arbitrary PHP into the log file with a single anonymous request and execute it by requesting the file directly, resulting in full remote code execution. Exploitation requires the site administrator to have enabled Page Caching with the Debug Log option (non-default), and the log file to be created during a front-end request — a state reached by the plugin's own 'Clear logs' action, any cache flush, or unattended via the plugin's daily log-rotation cron, which can strip the protective header from an existing log file.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
来源: CVE Program / CVE List V5
Vulnerability Title
WordPress Hummingbird Performance 代码注入漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
WordPress Hummingbird Performance是WordPress基金会开源的一款网站性能优化插件。 WordPress Hummingbird Performance 3.21.0及之前版本存在代码注入漏洞，该漏洞源于log_msg()函数在写入页面缓存调试日志时未对Cookie参数进行清理，且防护头部检查被绕过，可能导致未经身份验证的攻击者向日志文件写入并执行任意PHP代码，实现远程代码执行。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
wpmudev Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN 0 ~ 3.21.0 -

二、漏洞 CVE-2026-83627 的公开POC

# POC 描述 源链接 神龙链接
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三、漏洞 CVE-2026-83627 的情报信息

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CVE-2026-83627 补丁与修复 (1)

CVE-2026-83627 新闻报道 (1)

IV. Related Vulnerabilities

Same product: Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN
Same vendor: wpmudev
Same weakness: CWE-94

V. Comments for CVE-2026-83627

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