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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-12561— tagDiv Composer <= 5.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting

Quick assessment

Affected
tagDiv tagDiv Composer
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 tagDiv Composer 插件在所有 5.4.5 及以下版本中存在漏洞，攻击者可通过 短代码实现存储型跨站脚本攻击（Stored Cross-Site Scripting, XSS）。该漏洞源于 方法中输入 sanitization（净化）和输出转义（escaping）措施不足。该方法在保存时会对短代码内容进行 base64 解码：由于保存前经过 处理，而编码后的负载不包含 HTML 标签，因此该过滤机制可被绕过；解码后的内容随后被直接拼接至页面 HTML 中。 由于 WordPres

CVSS 6.4 · Medium EPSS 0.18% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
tagDiv tagDiv Composer ≤ 5.4.5 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-12561

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
tagDiv Composer <= 5.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting
Source: CVE Program / CVE List V5
Vulnerability Description
The tagDiv Composer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the vc_raw_html shortcode in all versions up to and including 5.4.5. This is due to insufficient input sanitization and output escaping in the vc_raw_html::render() method, which base64-decodes shortcode content (after a strip_tags() that is bypassed because the encoded payload contains no tags on save) and concatenates the result directly into the page HTML. Because WordPress's save-time wp_kses_post() filter only sees the inert base64 text inside a normal shortcode bracket and does not decode it, the dangerous tags survive into post_content and are emitted unescaped at render time. 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 (for example, when an Editor or Administrator previews the pending post).
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
tagDiv tagDiv Composer 0 ~ 5.4.5 -

II. Public POCs for CVE-2026-12561

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-12561

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-12561 (1)

Security Blog Posts for CVE-2026-12561 (1)

IV. Related Vulnerabilities

Same product: tagDiv Composer
Same vendor: tagDiv
Same weakness: CWE-79

V. Comments for CVE-2026-12561

No comments yet

Leave a comment