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CVE-2026-19902— Ad Inserter <= 2.8.18 - Reflected Cross-Site Scripting via {search-query} Dynamic Tag (Referer Header)

一分钟漏洞结论

影响对象
spacetime Ad Inserter – Ad Manager & AdSense Ads
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。

The Ad Inserter – Ad Manager & AdSense Ads plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the Referer header in all versions up to, and including, 2.8.18 due to insufficient input sanitization and output escaping on the '{search-query

CVSS 6.1 · Medium
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一、 漏洞 CVE-2026-19902 基础信息

漏洞信息

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Vulnerability Title
Ad Inserter <= 2.8.18 - Reflected Cross-Site Scripting via {search-query} Dynamic Tag (Referer Header)
来源: CVE Program / CVE List V5
Vulnerability Description
The Ad Inserter – Ad Manager & AdSense Ads plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the Referer header in all versions up to, and including, 2.8.18 due to insufficient input sanitization and output escaping on the '{search-query}' dynamic tag. When an ad block's code contains that tag, replace_ai_tags() reads $_SERVER['HTTP_REFERER'] and tests it with the regex /[\.\/](google|yahoo|bing|ask)\.[a-z\.]{2,5}[\/]/i. The leading [\.\/] class matches a literal slash, so any referrer merely containing a segment such as '/google.com/' passes as a search-engine referral; the plugin then percent-decodes the referring query with parse_str() and substitutes the resulting 'q' (or 'p') value into the block via preg_replace() with no escaping. This makes it possible for unauthenticated attackers to execute arbitrary JavaScript in the context of the site for any visitor, including a signed-in administrator, by luring them to an attacker-controlled page that frames or links to any ordinary post. Exploitation requires the site to have an ad block whose code uses the '{search-query}' tag with automatic insertion enabled — a documented plugin feature used as intended.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
spacetime Ad Inserter – Ad Manager & AdSense Ads 0 ~ 2.8.18 -

二、漏洞 CVE-2026-19902 的公开POC

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三、漏洞 CVE-2026-19902 的情报信息

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CVE-2026-19902 其他参考 (8)

IV. Related Vulnerabilities

Same product: Ad Inserter – Ad Manager & AdSense Ads
Same vendor: spacetime
Same weakness: CWE-79

V. Comments for CVE-2026-19902

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