CVE-2026-81825Simple Ajax Chat <= 20260811 - Unauthenticated Stored Cross-Site Scripting
Updated under an hour ago ()
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It affects specialk Simple Ajax Chat – Add a Fast, Secure Chat Box. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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The Simple Ajax Chat – Add a Fast, Secure Chat Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Chat Message in all versions up to, and including, <= 20260811 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. The nonce protecting chat message submission is publicly visible on the chat page, rendering it ineffective as an authentication barrier and allowing fully unauthenticated attackers to submit malicious messages that are stored persistently and rendered to all visitors on every page load.
- CVSS
- 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Sep 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
specialk Simple Ajax Chat – Add a Fast, Secure Chat Box specialk:simple_ajax_chat_add_a_fast_secure_chat_box (from the name) | through 20260811 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/8336d8d6-81ac-40a6-af1e-167c12440908?source=cve
- https://plugins.trac.wordpress.org/browser/simple-ajax-chat/trunk/simple-ajax-chat-form.php#L144
- https://plugins.trac.wordpress.org/browser/simple-ajax-chat/trunk/simple-ajax-chat-form.php#L143
- https://plugins.trac.wordpress.org/browser/simple-ajax-chat/trunk/simple-ajax-chat-form.php#L182
- https://plugins.trac.wordpress.org/browser/simple-ajax-chat/trunk/simple-ajax-chat-core.php#L34
- https://plugins.trac.wordpress.org/browser/simple-ajax-chat/trunk/simple-ajax-chat.php#L698
- https://plugins.trac.wordpress.org/browser/simple-ajax-chat/trunk/simple-ajax-chat.php#L329
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3669278%40simple-ajax-chat%2Ftrunk&old=3640838%40simple-ajax-chat%2Ftrunk&sfp_email=&sfph_mail=
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.