CVE-2026-1943Network attack vector

Authenticated stored XSS via unescaped template settings

Published Feb 18, 2026 · Updated Feb 18, 2026

Stored XSS in YayCommerce YayMail 4.3.2 and earlier allows remote authenticated users to inject scripts through template settings. TemplateController accepts template-element settings without sufficient sanitization, and text and order-detail renderers emit the stored values without context-appropriate escaping. Shop Manager-level access or higher is required, and exposure is limited to multisite installations or installations where unfiltered_html is disabled; visiting a page containing a saved payload executes it in that user's browser.

CVSS severity4.4
Medium
EPSS probability0.27%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in YayCommerce YayMail 4.3.2 and earlier allows remote authenticated users to inject scripts through template settings. TemplateController accepts template-element settings without sufficient sanitization, and text and order-detail renderers emit the stored values without context-appropriate escaping. Shop Manager-level access or higher is required, and exposure is limited to multisite installations or installations where unfiltered_html is disabled; visiting a page containing a saved payload executes it in that user's browser.

The record

CVE
CVE-2026-1943
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
YayCommerce
Product
YayMail
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=4.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

YayCommerce · YayMailversion=* <=4.3.2

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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