CVE-2026-81739

Paytm Payment Gateway < 2.8.9 - Unauthenticated Stored XSS via Payment Callback

Published Oct 1, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
The Paytm Payment Gateway WordPress plugin before 2.8.9 does not sanitize and escape data it stores from payment callbacks before outputting it in an admin page, and the integrity check on those callbacks can be forged when the gateway is enabled without credentials, allowing unauthenticated users to store scripts that will run in the session of a store administrator.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Paytm
Paytm payment Gateway
Wordpress-extensions
Wordpress-extensions paytm Payment Gateway
Vendors & Products Paytm
Paytm payment Gateway
Wordpress-extensions
Wordpress-extensions paytm Payment Gateway
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-79
Type Values Removed Values Added
Description The Paytm Payment Gateway WordPress plugin before 2.8.9 does not sanitize and escape data it stores from payment callbacks before outputting it in an admin page, and the integrity check on those callbacks can be forged when the gateway is enabled without credentials, allowing unauthenticated users to store scripts that will run in the session of a store administrator.
Title Paytm Payment Gateway < 2.8.9 - Unauthenticated Stored XSS via Payment Callback
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Oct 1, 2026, 10:55 AM
Reserved
Aug 27, 2026, 11:47 AM
Status
Deferred
Published
Oct 1, 2026, 6:17 AM
Modified
Oct 1, 2026, 1:11 PM