CVE-2021-24577— Coming Soon and Maintenance Mode < 3.5.3 - Authenticated Stored XSS
Quick assessment
Affected
Unknown Coming soon and Maintenance mode
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 插件是WordPress开源的一个应用插件。 WordPress 插件 Coming soon and Maintenance存在跨站脚本漏洞，该漏洞源于WEB应用缺少对客户端数据的正确验证。攻击者可利用该漏洞执行客户端代码。
Possible ATT&CK Techniques 1 AI
T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2021-24577
Vulnerability Information
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Vulnerability Title
Coming Soon and Maintenance Mode < 3.5.3 - Authenticated Stored XSS
Source: CVE Program / CVE List V5
Vulnerability Description
The Coming soon and Maintenance mode WordPress plugin before 3.5.3 does not properly sanitize inputs submitted by authenticated users when setting adding or modifying coming soon or maintenance mode pages, leading to stored XSS.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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 插件 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress 插件是WordPress开源的一个应用插件。 WordPress 插件 Coming soon and Maintenance存在跨站脚本漏洞，该漏洞源于WEB应用缺少对客户端数据的正确验证。攻击者可利用该漏洞执行客户端代码。
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 | Coming soon and Maintenance mode | 3.5.3 ~ 3.5.3 | - |
|
II. Public POCs for CVE-2021-24577
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-24577 (1)
Same Patch Batch · Unknown · 2021-10-11 · 17 CVEs total
| CVE-2021-24737 | Comments - wpDiscuz <= 7.3.0 - Admin+ Stored Cross-Site Scripting | |
| CVE-2021-24720 | GeoDirectory < 2.1.1.3 - Authenticated Stored Cross-Site Scripting (XSS) | |
| CVE-2021-24719 | Enfold Theme < 4.8.4 - Reflected Cross-Site Scripting (XSS) | |
| CVE-2021-24712 | Appointment Hour Booking – WordPress Booking Plugin < 1.3.17 - Authenticated Stored XSS | |
| CVE-2021-24711 | Software License Manager < 4.5.1 - Arbitrary Domain Deletion via CSRF | |
| CVE-2021-24709 | Weather Effect < 1.3.6 - Admin+ Stored Cross-Site Scripting | |
| CVE-2021-24691 | Quiz And Survey Master < 7.3.2 - Admin+ Stored Cross-Site Scripting | |
| CVE-2021-24690 | Chained Quiz < 1.2.7.2 - Authenticated Stored Cross Site Scripting | |
| CVE-2021-24683 | Weather Effect < 1.3.4 - CSRF to Stored Cross-Site Scripting | |
| CVE-2021-24681 | Duplicate Page <= 4.4.2 - Admin+ Stored Cross-Site Scripting | |
| CVE-2021-24656 | Simple Social Media Share Buttons < 3.2.4 - Authenticated Stored Cross-Site Scripting | |
| CVE-2021-24651 | Poll Maker < 3.4.2 - Unauthenticated Time Based SQL Injection | |
| CVE-2021-24576 | Easy Accordion < 2.0.22 - Authenticated Stored XSS | |
| CVE-2021-24563 | Frontend Uploader <= 1.3.2 - Unauthenticated Stored Cross-Site Scripting | |
| CVE-2021-24546 | EditorsKit < 1.31.6 - Contributor+ Arbitrary PHP Code Execution | |
| CVE-2021-24545 | WP HTML Author Bio <= 1.2.0 - Author+ Stored Cross-Site Scripting |
IV. Related Vulnerabilities
Same vendor: Unknown
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CVE-2026-94274
YayReviews 1.0.4 - 1.4.0 - Unauthenticated Sensitive Data Di -
CVE-2026-94297
Media Library Organizer 2.0.4 - 2.1.3 - Contributor+ Arbitra -
CVE-2026-96886
Course Booking System < 7.0.9 - Unauthenticated Attendee PII -
CVE-2026-97316
Broken Link Notifier 1.3.1 - 2.0.0 - Unauthenticated SSRF vi -
CVE-2026-92424
Content Egg < 11.9.0 - Contributor+ Stored XSS via Import Qu
Same weakness: CWE-79
-
CVE-2026-103590
QloApps through 1.7.0 Reflected XSS via Length of Stay Field -
CVE-2026-103589
QloApps through 1.7.0 Reflected XSS via Room Type Editor -
CVE-2026-103588
QloApps through 1.7.0 Reflected XSS via exceptions field -
CVE-2026-103587
QloApps through 1.7.0 Reflected XSS via Book Now Search Para -
CVE-2026-47096
AJA HELO Plus < 2.1.7 Stored XSS via System Name Parameter
V. Comments for CVE-2021-24577
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