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CVE-2026-107743— Mapster WP Maps <= 2.0.5 - Unauthenticated Stored Cross-Site Scripting via 'config.loading.background' Parameter

Quick assessment

Affected
mapster Mapster WP Maps
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 Mapster WP Maps 插件在 2.0.5 及以下版本中存在存储型跨站脚本（Stored XSS）漏洞。该漏洞的成因是：/wp-json/mapster-wp-maps/save-mapmaker 这个 REST API 路由在注册时，其 permission_callback 无条件返回 true（即未进行任何权限能力检查，也未验证 nonce）；同时，mapster_write_config_to_acf() 辅助函数仅对字符串配置值使用 sanitize_text_field(

CVSS 7.2 · High
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I. Basic Information for CVE-2026-107743

Vulnerability Information
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Vulnerability Title
Mapster WP Maps <= 2.0.5 - Unauthenticated Stored Cross-Site Scripting via 'config.loading.background' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Mapster WP Maps plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.0.5. This is due to the /wp-json/mapster-wp-maps/save-mapmaker REST route being registered with a permission_callback that unconditionally returns true (no capability check, no nonce), together with the mapster_write_config_to_acf() helper only sanitizing string config values with sanitize_text_field() — which strips HTML tags but leaves quote characters intact — and the mapster_wp_map shortcode renderer in mapster_wordpress_maps_shortcode_display() concatenating the stored loading_background_color value into a single-quoted inline style attribute without esc_attr(). This makes it possible for unauthenticated attackers 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:N/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
mapster Mapster WP Maps 0 ~ 2.0.5 -

II. Public POCs for CVE-2026-107743

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III. Intelligence Information for CVE-2026-107743

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Other References for CVE-2026-107743 (6)

IV. Related Vulnerabilities

Same product: Mapster WP Maps
Same vendor: mapster
Same weakness: CWE-79