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CVE-2026-12115— Counter Box <= 2.0.13 - Authenticated (Administrator+) PHP Object Injection via Import

Quick assessment

Affected
wpcalc Counter Box – Add Countdowns, Timers & Dynamic Counters to WordPress
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.

Wpcalc Counter Box是Wpcalc公司的一款为WordPress添加倒计时、计时器和动态计数器的插件。 Wpcalc Counter Box 2.0.13及之前版本存在反序列化漏洞，该漏洞源于对不可信输入的反序列化，可能导致PHP对象注入，使得具有管理员权限及以上的认证攻击者进行注入，如果站点上安装了其他包含POP链的插件或主题，可能允许攻击者删除任意文件、检索敏感数据或执行代码。

CVSS 6.6 · Medium EPSS 0.52% · P42

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpcalc Counter Box – Add Countdowns, Timers & Dynamic Counters to WordPress ≤ 2.0.13 affected
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I. Basic Information for CVE-2026-12115

Vulnerability Information
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Vulnerability Title
Counter Box <= 2.0.13 - Authenticated (Administrator+) PHP Object Injection via Import
Source: CVE Program / CVE List V5
Vulnerability Description
The Counter Box – Add Countdowns, Timers & Dynamic Counters to WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.0.13 via deserialization of untrusted input . This makes it possible for authenticated attackers, with administrator-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. Deserialization is triggered automatically upon the post-import redirect that renders the list table, and again when any item is opened for editing, requiring no additional navigation beyond the import action itself.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Wpcalc Counter Box 反序列化漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wpcalc Counter Box是Wpcalc公司的一款为WordPress添加倒计时、计时器和动态计数器的插件。 Wpcalc Counter Box 2.0.13及之前版本存在反序列化漏洞，该漏洞源于对不可信输入的反序列化，可能导致PHP对象注入，使得具有管理员权限及以上的认证攻击者进行注入，如果站点上安装了其他包含POP链的插件或主题，可能允许攻击者删除任意文件、检索敏感数据或执行代码。
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
wpcalc Counter Box – Add Countdowns, Timers & Dynamic Counters to WordPress 0 ~ 2.0.13 -

II. Public POCs for CVE-2026-12115

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III. Intelligence Information for CVE-2026-12115

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Patches & Fixes for CVE-2026-12115 (3)

Vendor Advisories for CVE-2026-12115 (1)

IV. Related Vulnerabilities

Same product: Counter Box – Add Countdowns, Timers & Dynamic Counters to WordPress
Same vendor: wpcalc
Same weakness: CWE-502

V. Comments for CVE-2026-12115

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