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CVE-2026-115498: Slim Jetpack Cross Site Scripting Vulnerability

CVE-2026-115498 explained: high Cross Site Scripting in Slim Jetpack. CVSS 7.2. Affected versions, detection, fixes and CTEM priority.

Last updated: Nov 4, 2026

CVSS
7.2 HIGH
EPSS
n/a
CISA KEV
Not listed
CWE
CWE-79

Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS

CVE-2026-115498 Overview

The Slim Jetpack plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'g<PAGE_ID>-website (Website contact-field)' parameter in all versions up to, and including, 2.7.0.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The nonce and authentication checks on form submission are only enforced for logged-in users, allowing unauthenticated visitors to store payloads via any page containing the [contact-form] shortcode.

Critical Impact

Remote, unauthenticated attackers can exploit this Cross Site Scripting in Slim Jetpack. The CVSS base score is 7.2 (High).

Affected Products

  • Slim Jetpack: see the vendor advisory for the exact affected versions

Discovery Timeline

  • 2026-11-04: CVE-2026-115498 published to the National Vulnerability Database by security@wordfence.com
  • 2026-11-04: last updated in the NVD database

Technical Details for CVE-2026-115498

Vulnerability Analysis

CVE-2026-115498 is a Cross Site Scripting weakness (CWE-79: Cross Site Scripting) in Slim Jetpack. Based on its CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Attacker supplied script runs in another user's browser inside the trusted site.

With a CVSS base score of 7.2, apply the vendor fix and confirm exposure on internet facing and business critical assets first.

Root Cause

The weakness is classified as CWE-79: Cross Site Scripting. Attacker supplied script runs in another user's browser inside the trusted site.

Attack Vector

Based on the CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Attack complexity is low complexity.

No exploitation in the wild is confirmed by CISA at the time of the last update. Check the references below for any vendor or researcher proof of concept.

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

Detection Methods for CVE-2026-115498

Detection Strategies

  • Inventory every instance of Slim Jetpack and compare the running version with the affected range above.
  • Check external attack surface scans for internet facing instances of the component.
  • Run an authenticated vulnerability scan once your scanner ships a check for this CVE.

Monitoring Recommendations

  • Forward Slim Jetpack application, access and audit logs to your SIEM for retrospective hunting.
  • Alert on new processes, configuration changes or outbound connections from the affected service.
  • Track the vendor advisory and the CISA KEV catalog for changes in exploitation status.

How to Mitigate CVE-2026-115498

Immediate Actions Required

  • Apply the fixed version of Slim Jetpack named in the vendor advisory.
  • Prioritize internet facing and business critical instances first.
  • Rescan after the change to confirm the exposure is closed.

Patch Information

Use the fixed version listed in the vendor advisory for Slim Jetpack.

Workarounds

  • If patching must wait, restrict network access to the affected service and place it behind authentication or a web application firewall rule.

CWE References

Technical References

This entry is built directly from NVD, CISA KEV and EPSS data. Verify fixed versions in the vendor advisory before you deploy.

Frequently asked questions

CVE-2026-115498 is a high severity Cross Site Scripting in Slim Jetpack with a CVSS score of 7.2. Apply the vendor fix and confirm exposure on internet facing and business critical assets first.

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