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CVE-2026-3577— Keep Backup Daily <= 2.1.2 - Authenticated (Admin+) Stored Cross-Site Scripting via Backup Title

Quick assessment

Affected
fahadmahmood Keep Backup Daily
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和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Keep Backup Daily 2.1.2及之前版本存在跨站脚本漏洞，该漏洞源于update_kbd_bkup_alias AJAX操作中备份标题别名输入清理和输出转义不足，可能导致存储型跨站脚本攻击。

CVSS 4.4 · Medium EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2026-3577

Vulnerability Information
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Vulnerability Title
Keep Backup Daily <= 2.1.2 - Authenticated (Admin+) Stored Cross-Site Scripting via Backup Title
Source: CVE Program / CVE List V5
Vulnerability Description
The Keep Backup Daily plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the backup title alias (`val` parameter) in the `update_kbd_bkup_alias` AJAX action in all versions up to, and including, 2.1.2. This is due to insufficient input sanitization and output escaping. While `sanitize_text_field()` strips HTML tags on save, it does not encode double quotes. The backup titles are output in HTML attribute contexts without `esc_attr()`. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts via attribute injection that will execute whenever another administrator views the backup list page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/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
Vulnerability Title
WordPress plugin Keep Backup Daily 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Keep Backup Daily 2.1.2及之前版本存在跨站脚本漏洞，该漏洞源于update_kbd_bkup_alias AJAX操作中备份标题别名输入清理和输出转义不足，可能导致存储型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
fahadmahmood Keep Backup Daily * ~ 2.1.2 -

II. Public POCs for CVE-2026-3577

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III. Intelligence Information for CVE-2026-3577

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Patches & Fixes for CVE-2026-3577 (5)

Vendor Advisories for CVE-2026-3577 (1)

Same Patch Batch · fahadmahmood · 2026-03-20 · 3 CVEs total

CVE-2026-3368 7.2 HIGH Injection Guard <= 1.2.9 - Unauthenticated Stored Cross-Site Scripting via Query Parameter
CVE-2026-3339 2.7 LOW Keep Backup Daily <= 2.1.1 - Authenticated (Admin+) Limited Path Traversal via 'kbd_path'

IV. Related Vulnerabilities

Same product: Keep Backup Daily
Same vendor: fahadmahmood
Same weakness: CWE-79

V. Comments for CVE-2026-3577

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