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CVE-2026-13458— GenerateBlocks <= 2.3.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Dynamic Tag Injection in HTML Attributes

Quick assessment

Affected
edge22 GenerateBlocks
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.

edge22 GenerateBlocks是edge22的CMS脚本语言组件。 WordPress GenerateBlocks 2.3.0及之前版本存在跨站脚本漏洞，该漏洞源于对HTML属性中的动态标签注入输入清理和输出转义不足，可能导致具有贡献者及以上权限的认证攻击者在页面中注入任意Web脚本，造成存储型跨站脚本攻击。

CVSS 6.4 · Medium EPSS 0.42% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
edge22 GenerateBlocks ≤ 2.3.0 affected
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I. Basic Information for CVE-2026-13458

Vulnerability Information
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Vulnerability Title
GenerateBlocks <= 2.3.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Dynamic Tag Injection in HTML Attributes
Source: CVE Program / CVE List V5
Vulnerability Description
The GenerateBlocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Dynamic Tag Injection in HTML Attributes in all versions up to, and including, 2.3.0 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. A Contributor-level attacker can store the malicious payload by placing a dynamic tag such as {{post_meta key:...}} in a non-URL HTML attribute (e.g., title, aria-label, alt, or data-* attributes) of a GenerateBlocks element block, then setting the corresponding unprotected post meta key via the Custom Fields metabox to a value containing a closing quote and an injected event-handler attribute.
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
Vulnerability Title
WordPress GenerateBlocks 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
edge22 GenerateBlocks是edge22的CMS脚本语言组件。 WordPress GenerateBlocks 2.3.0及之前版本存在跨站脚本漏洞，该漏洞源于对HTML属性中的动态标签注入输入清理和输出转义不足，可能导致具有贡献者及以上权限的认证攻击者在页面中注入任意Web脚本，造成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
edge22 GenerateBlocks 0 ~ 2.3.0 -

II. Public POCs for CVE-2026-13458

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III. Intelligence Information for CVE-2026-13458

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Patches & Fixes for CVE-2026-13458 (5)

Vendor Advisories for CVE-2026-13458 (1)

Vendor Pages for CVE-2026-13458 (1)

Other References for CVE-2026-13458 (1)

IV. Related Vulnerabilities

Same product: GenerateBlocks
Same vendor: edge22
Same weakness: CWE-79

V. Comments for CVE-2026-13458

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