CVE-2026-5341 is a stored cross-site scripting vulnerability in the NMR Strava activities WordPress plugin caused by improper neutralization of input in the strava_nmr_connect shortcode. This allows authenticated users with contributor or higher privileges to inject arbitrary JavaScript code into pages via unsanitized shortcode attributes. The vulnerability affects all versions up to and including 1.0.14. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, required privileges at the contributor level, no user interaction, and partial impact on confidentiality and integrity with no impact on availability. No vendor patch or official remediation is currently documented.

Successful exploitation allows an authenticated contributor or higher to inject and execute arbitrary scripts in the context of the affected WordPress site. This can lead to partial confidentiality and integrity impacts, such as theft of user session data, unauthorized actions performed on behalf of users, or defacement of content. There is no impact on system availability. No known active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict contributor-level access to trusted users only and consider disabling or removing the NMR Strava activities plugin if feasible. Monitor for updates from the vendor or security advisories to apply any forthcoming patches promptly.