Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-109215— LiteSpeed Cache <= 7.9.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting via VPI Image Attribute Re-Serialization

Quick assessment

Affected
litespeedtech LiteSpeed Cache
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 的 LiteSpeed Cache 插件在 7.9.1 及更早的所有版本中，因输入清理和输出转义不足，存在通过 参数触发的存储型跨站脚本（Stored XSS）漏洞。该漏洞允许拥有订阅者（Subscriber）及以上权限的已认证攻击者，在页面中注入任意 Web 脚本；当其他用户访问被注入的页面时，这些脚本将被执行。 成功利用该漏洞需要满足以下条件：管理员已启用“视口图像”（Viewport Images，简称 VPI）功能，并配置了一个 VPI 文件名，该文件名与攻击者能够在用户生成内容中嵌入的

CVSS 6.4 · Medium

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-109215

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
LiteSpeed Cache <= 7.9.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting via VPI Image Attribute Re-Serialization
Source: CVE Program / CVE List V5
Vulnerability Description
The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'bbp_reply_content' parameter in all versions up to, and including, 7.9.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that an administrator has enabled Viewport Images (VPI) and configured a VPI filename that matches an image the attacker can embed in user-generated content — such as a bbPress topic where Subscriber-level Participants are permitted to post replies containing raw img tags.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: 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)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
litespeedtech LiteSpeed Cache 0 ~ 7.9.1 -

II. Public POCs for CVE-2026-109215

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-109215

请登录查看更多情报信息。

Other References for CVE-2026-109215 (6)

IV. Related Vulnerabilities

Same product: LiteSpeed Cache
Same vendor: litespeedtech
Same weakness: CWE-79