CVE-2026-26483
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
Mettle SendPortal 3.0.1 and earlier contains a stored XSS vulnerability in the template management functionality. The application fails to properly sanitize user-supplied input in the content parameter of the /templates endpoint, allowing an attacker to persistently inject malicious JavaScript code.
Risk Assessment
An attacker can execute arbitrary scripts in the browsers of users accessing the affected template, potentially leading to session theft, data leakage, or further attacks.
Recommendation
Update Mettle SendPortal to the latest patched version. Implement input validation and sanitization for all template fields.
Other vulnerabilities in Mettle SendPortal
See all- CVE-2026-15192Medium
A missing authentication vulnerability has been found in Mettle SendPortal up to version 3.0.1, affecting the APIv1 Webhooks component for sendgrid/postmark/postal/mailjet functions. The attack can be carried out remotely and the exploit has been publicly disclosed.
- CVE-2026-15191Medium
A vulnerability has been found in Mettle SendPortal up to version 3.0.1 in the campaign creation endpoint. Unknown code in CampaignStoreRequest.php allows remote authorization bypass. The exploit has been published and may be used.
- CVE-2026-10234Low
An unknown part of the /webview/ file in the Campaign Handler component in Mettle sendportal up to version 3.0.1 is vulnerable to XSS via manipulation of the content argument. The attack can be performed remotely and the exploit is publicly available. The project was notified but has not responded.
Original NVD description (English source)
Mettle SendPortal 3.0.1 and earlier contains a stored cross-site scripting (XSS) vulnerability in the template management functionality. The application fails to properly sanitize user-supplied input in the content parameter of the /templates endpoint, allowing an attacker to persistently inject malicious JavaScript code that is executed in the browsers of users who access the affected template.