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CVE-2026-16495— Countdown Timer – Widget Countdown <= 3.0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'redirect_url' Shortcode Attribute

Quick assessment

Affected
wpdevart Countdown Timer – Widget Countdown
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 Countdown Timer – Widget Countdown 插件存在存储型跨站脚本漏洞（Stored Cross-Site Scripting，XSS）。该漏洞出现在所有不超过 3.0.1 版本中，原因是插件在处理 'redirect_url' 短代码属性时，没有进行足够的输入净化和输出转义。因此，拥有贡献者及以上级别的已认证攻击者可以注入任意 Web 脚本，当其他用户访问包含注入脚本的页面时，这些脚本就会在页面中执行。

CVSS 6.4 · Medium EPSS 0.21% · P10

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpdevart Countdown Timer – Widget Countdown 3.0.0≤ 3.0.1 affected
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I. Basic Information for CVE-2026-16495

Vulnerability Information
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Vulnerability Title
Countdown Timer – Widget Countdown <= 3.0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'redirect_url' Shortcode Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Countdown Timer – Widget Countdown plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'redirect_url' Shortcode Attribute in all versions up to, and including, 3.0.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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
wpdevart Countdown Timer – Widget Countdown 3.0.0 ~ 3.0.1 -

II. Public POCs for CVE-2026-16495

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III. Intelligence Information for CVE-2026-16495

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Other References for CVE-2026-16495 (2)

IV. Related Vulnerabilities

Same product: Countdown Timer – Widget Countdown
Same vendor: wpdevart
Same weakness: CWE-79

V. Comments for CVE-2026-16495

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