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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-19856— All in One SEO < 5.0.2.1 - Unauthenticated Arbitrary Shortcode Execution via Search Query

Quick assessment

Affected
Unknown All in One SEO
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.

All in One SEO WordPress 插件在 5.0.2.1 版本之前存在安全漏洞，其在判断应移除哪些短代码（shortcodes）时，未能正确识别内容中（该内容来源于用户输入）实际存在哪些短代码。这一缺陷使得未经认证的用户能够执行该网站上注册的任意短代码。对于从旧版本升级而来的站点，该防护措施被完全禁用，导致攻击者无需构造任何特殊输入即可利用此漏洞。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown All in One SEO < 5.0.2.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-19856

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
All in One SEO < 5.0.2.1 - Unauthenticated Arbitrary Shortcode Execution via Search Query
Source: CVE Program / CVE List V5
Vulnerability Description
The All in One SEO WordPress plugin before 5.0.2.1 does not correctly determine which shortcodes are present in content derived from user input before deciding which ones to strip, allowing unauthenticated users to execute arbitrary shortcodes registered on the site. On sites upgraded from older versions the protection is disabled outright, making the issue reachable without any crafted input.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown All in One SEO 0 ~ 5.0.2.1 -

II. Public POCs for CVE-2026-19856

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-19856

请登录查看更多情报信息。

Other References for CVE-2026-19856 (1)

Same Patch Batch · Unknown · 2026-10-02 · 22 CVEs total

CVE-2026-84740 6.5 MEDIUM The Events Calendar 6.12.0 - 6.17.5 - Unauthenticated Arbitrary Shortcode Execution via 'v
CVE-2026-85005 5.4 MEDIUM Popup Maker WP 1.2.2.1 - 1.4.5 - Subscriber+ Zero-Argument PHP Callable Invocation via Mis
CVE-2026-92924 5.4 MEDIUM Unlimited Elements For Elementor < 2.0.21 - Subscriber+ Arbitrary Shortcode Execution via
CVE-2026-91020 5.3 MEDIUM WebToffee Gift Cards for WooCommerce < 1.3.1 - Unauthenticated Gift Card Amount Manipulati
CVE-2026-90987 5.3 MEDIUM Easy PayPal & Stripe Buy Now Button 1.8 - 2.0.5 - Unauthenticated Payment Amount Manipulat
CVE-2026-90952 5.3 MEDIUM WP Edit Password Protected 2.0.0 - 2.0.6 - Unauthenticated Site-Wide Access Mode Bypass vi
CVE-2026-13413 5.3 MEDIUM CMP - Coming Soon & Maintenance < 4.1.20 - Unauthenticated Maintenance Mode Bypass via Log
CVE-2026-97219 4.3 MEDIUM MStore API 4.21.1 - 4.22.0 - Subscriber+ Payment Bypass via 'status' Parameter
CVE-2026-79618 4.3 MEDIUM WP User Frontend < 4.3.12 - Subscriber+ Post Creation via Subscription-Gated Form
CVE-2026-1661 4.3 MEDIUM WP Mail Logging < 1.17.0 - Unauthenticated HTML Injection
CVE-2026-81740 Paytm Payment Gateway < 2.8.9 - Unauthenticated Order Status Manipulation via Payment Call
CVE-2026-85004 Popup Maker WP <= 1.4.5 - Subscriber+ Missing Authorization via sgpm_connect
CVE-2026-91828 OMGF < 6.3.11 - Unauthenticated DoS via do_optimize
CVE-2026-90988 Request a Quote <= 2.5.6 - Unauthenticated Quote Request Contact Record Disclosure via emd
CVE-2026-85016 Unlimited Elements For Elementor < 2.0.21 - Contributor+ Stored XSS via Icon Library Param
CVE-2026-13718 Tabs Responsive <= 2.5 - Shop Manager+ Stored XSS via WooCommerce Product Tab Content
CVE-2026-91022 Motors < 1.4.124 - Listing Manager+ Stored XSS via Badge Color
CVE-2026-91023 Motors – Car Dealership & Classified Listings < 1.4.124 - Subscriber+ Cross-User Post Meta
CVE-2026-94298 BuildKit < 1.0.29 - Contributor+ Stored SQLi via list_content Parameter
CVE-2026-97318 Giveaways and Contests by RafflePress < 1.12.27 - Unauthenticated Stored Open Redirect via

Showing top 20 of 22 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: All in One SEO
Same vendor: Unknown

V. Comments for CVE-2026-19856

No comments yet

Leave a comment