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Simple Ajax Chat – Add a Fast, Secure Chat Box < 20260827 — Unauthenticated Stored Cross-Site Scripting

CVE-2026-81807Published · Updated

Action summary

Affected: <20260827Update to 20260827 or newer

All remediation steps
Watch plugin
Severity
High7.2
CVSS
7.2
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:C Scope
Changed
C:L Confidentiality
Low
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-79 Cross-Site Scripting
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Simple Ajax Chat – Add a Fast, Secure Chat Box simple-ajax-chat

  1. Affected< 20260827
  2. Patched in20260827

Update to 20260827 or newer.

You are affected if you run < 20260827. Version 20260827 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Simple Ajax Chat – Add a Fast, Secure Chat Box.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 20260827, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Simple Ajax Chat – Add a Fast, Secure Chat Box to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Erwan LR.

The Simple Ajax Chat – Add a Fast, Secure Chat Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to 20260827. This is due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Simple Ajax Chat – Add a Fast, Secure Chat Box

All 10
More vulnerabilities in Simple Ajax Chat – Add a Fast, Secure Chat Box
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting
≤20260811Update to 20260827
CVE-2026-81825
Medium6.1Unauthenticated Stored Cross-Site Scripting via 'c'
≤20260217Update to 20260301
CVE-2026-2987
Medium5.3Unauthenticated Information Exposure
≤20251121Update to 20260217
CVE-2026-3075
Medium4.4Authenticated (Admin+) Stored Cross-Site Scripting
≤20240318Update to 20240412
CVE-2024-2470
High7.2 Unauthenticated Stored Cross-Site Scripting
≤20240216Update to 20240223
CVE-2024-1983

Same weakness (Cross-Site Scripting)

All Cross-Site Scripting
Other Cross-Site Scripting vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity high, CVSS 7.2

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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