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Cross-site Scripting (XSS)Weakness · CWE-79

CVE-2026-5341

MEDIUM · 6.4 CVSS v3.1 Published 2026-05-08
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
70/100
Remediation priority · Elevated
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
The NMR Strava activities plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's `strava_nmr_connect` shortcode in all versions up to, and including, 1.0.14 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

The NMR Strava activities WordPress plugin fails to sanitize input and escape output in the strava_nmr_connect shortcode attributes, allowing authenticated contributors and above to inject persistent JavaScript payloads that execute when users view affected pages.

MitigationUpdate the plugin to version 1.0.15 or later which includes proper input sanitization and output escaping; alternatively, disable the strava_nmr_connect shortcode until a patch is applied.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Verify the NMR Strava activities plugin is installed
    In WordPress admin, go to Plugins > Installed Plugins and look for 'NMR Strava activities' or check the plugin files in wp-content/plugins/ for a folder containing 'strava' in the name
    Affected if the plugin is installed and active
  2. Determine the installed plugin version
    In WordPress admin, go to Plugins > Installed Plugins, find 'NMR Strava activities', and view the version number displayed under the plugin name; alternatively, check the plugin's main PHP file for the 'Version' header in the plugin comment block
    Affected if the version is lower than 1.0.15 or if the version cannot be determined (unpatched versions)
  3. Identify usage of the vulnerable shortcode
    Search your WordPress database for posts, pages, or widgets containing the shortcode [strava_nmr_connect] using tools like phpMyAdmin or WP-CLI: wpdb get var "SELECT COUNT(*) FROM wp_posts WHERE post_content LIKE '%[strava_nmr_connect%'"
    Affected if the shortcode is present in any published content and the plugin version is unpatched
  4. Check for suspicious script injections in shortcode attributes
    Examine any posts/pages containing the [strava_nmr_connect] shortcode and inspect the attribute values for unexpected characters like quotes, script tags, or javascript: protocol handlers that may indicate exploitation
    Affected if any shortcode attributes contain encoded or raw JavaScript, event handlers, or suspicious payloads

You are affected if the NMR Strava activities plugin is installed with a version before 1.0.15 AND the strava_nmr_connect shortcode is used in any content, as the combination of unpatched plugin and active shortcode enables authenticated attackers to inject persistent JavaScript.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update the plugin to version 1.0.15 or later which includes proper input sanitization and output escaping; alternatively, disable the strava_nmr_connect shortcode until a patch is applied.

Recommended fix Moderate confidence

Update to version 1.0.15 or later

  1. Navigate to the WordPress admin dashboard
  2. Go to Plugins > Installed Plugins
  3. Locate the NMR Strava activities plugin
  4. Check if an update is available and update to the latest version (after 1.0.14)
  5. Alternatively, navigate to Dashboard > Updates and update the plugin there

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation3.0 h
  • Testing3.0 h
  • Review / QA2.0 h
10.0 hours of engineering $1,750
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-5341 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data