CVE-2021-24252— Event Banner <= 1.3 - Arbitrary File Upload to RCE
Quick assessment
Affected
Unknown Event Banner
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是WordPress（Wordpress）基金会的一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。 WordPress插件Event Banner 1.3版本及之前版本存在安全漏洞，该漏洞允许管理员帐户上传任意文件，如.exe， .php或其他可执行文件，从而导致RCE。
Possible ATT&CK Techniques 3 AI
T1190 · Exploit Public-Facing Application T1059 · Command and Scripting Interpreter T1505.003 · Web Shell
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I. Basic Information for CVE-2021-24252
Vulnerability Information
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Vulnerability Title
Event Banner <= 1.3 - Arbitrary File Upload to RCE
Source: CVE Program / CVE List V5
Vulnerability Description
The Event Banner WordPress plugin through 1.3 does not verify the uploaded image file, allowing admin accounts to upload arbitrary files, such as .exe, .php, or others executable, leading to RCE. Due to the lack of CSRF check, the issue can also be used via such vector to achieve the same result, or via a LFI as authorisation checks are missing (but would require WP to be loaded)
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress是WordPress（Wordpress）基金会的一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。 WordPress插件Event Banner 1.3版本及之前版本存在安全漏洞，该漏洞允许管理员帐户上传任意文件，如.exe， .php或其他可执行文件，从而导致RCE。
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 |
|---|---|---|---|---|
| Unknown | Event Banner | 1.3 ~ 1.3 | - |
|
II. Public POCs for CVE-2021-24252
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-24252 (1)
-
https://wpscan.com/vulnerability/91e81c6d-f24d-4f87-bc13-746715af8f7c x_refsource_CONFIRM
Other References for CVE-2021-24252 (1)
Same Patch Batch · Unknown · 2021-05-05 · 21 CVEs total
| CVE-2021-24272 | Fitness Calculators < 1.9.6 - Cross-Site Request Forgery to Cross-Site Scripting (XSS) | |
| CVE-2021-24256 | Elementor - Header, Footer & Blocks Template < 1.5.8 - Contributor+ Stored XSS | |
| CVE-2021-24255 | Essential Addons for Elementor < 4.5.4 - Contributor+ Stored Cross-Site Scripting (XSS) | |
| CVE-2021-24264 | Image Hover Effects - Elementor Addon < 1.3.4 - Contributor+ Stored XSS | |
| CVE-2021-24263 | PowerPack Addons for Elementor < 2.3.2 - Contributor+ Stored XSS | |
| CVE-2021-24262 | WooLentor - WooCommerce Elementor Addons + Builder < 1.8.6 - Contributor+ Stored XSS | |
| CVE-2021-24261 | HT Mega - Absolute Addons for Elementor Page Builder < 1.5.7 - Contributor+ Stored XSS | |
| CVE-2021-24260 | Livemesh Addons for Elementor < 6.8 - Contributor+ Stored XSS | |
| CVE-2021-24259 | Elementor Addon Elements < 1.11.2 - Contributor+ Stored XSS | |
| CVE-2021-24257 | Premium Addons for Elementor < 4.2.8 - Contributor+ Stored Cross-Site Scripting (XSS) | |
| CVE-2021-24254 | College Publisher Import <= 0.1 - Arbitrary File Upload to RCE | |
| CVE-2021-24271 | Ultimate Addons for Elementor < 1.30.0 - Contributor+ Stored XSS | |
| CVE-2021-24270 | DethemeKit For Elementor < 1.5.5.5 - Contributor+ Stored XSS | |
| CVE-2021-24269 | Sina Extension for Elementor < 3.3.12 - Contributor+ Stored XSS | |
| CVE-2021-24268 | JetWidgets For Elementor < 1.0.9 - Contributor+ Stored XSS | |
| CVE-2021-24267 | All-in-One Addons for Elementor - WidgetKit < 2.3.10 - Contributor+ Stored XSS | |
| CVE-2021-24266 | The Plus Addons for Elementor Page Builder Lite < 2.0.6 - Contributor+ Stored XSS | |
| CVE-2021-24265 | Rife Elementor Extensions & Templates < 1.1.6 - Contributor+ Stored XSS | |
| CVE-2021-24293 | NextGEN Gallery Pro < 3.1.11 - Reflected Cross-Site Scripting (XSS) | |
| CVE-2021-24253 | Classyfrieds <= 3.8 - Authenticated Arbitrary File Upload to RCE |
IV. Related Vulnerabilities
Same vendor: Unknown
-
CVE-2026-77115
Brave Popup Builder < 0.8.6 - Unauthenticated Reflected XSS -
CVE-2026-77116
Brave Popup Builder < 0.8.6 - Subscriber+ Unpublished Popup -
CVE-2026-77003
Content Mask 1.8.0 - 1.8.5.4 - Contributor Publish Capabilit -
CVE-2026-14853
WooCommerce Bookings < 3.9.0 - Subscriber+ Draft Bookable Pr -
CVE-2026-13598
RestrictMate < 1.3.0 - Unauthenticated Privilege Escalation
Same weakness: CWE-434
-
CVE-2026-78337
Unrestricted upload of file with dangerous type in Prospero -
CVE-2026-78245
itsourcecode Online Pharmacy System User Registration regist -
CVE-2026-78202
itsourcecode Payroll System admin_class.php save_settings un -
CVE-2026-19852
CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload -
CVE-2026-49849
xShop: Unrestricted File Upload in File Attachment Module in
V. Comments for CVE-2021-24252
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