Read the docs
TI-2026-66015 Aliases CVE-2026-103426GHSA-64c7-fgwg-hx23

Relevanssi Premium <= 2.31.4 - Unauthenticated Stored Cross-Site Scripting via '_rt' Parameter

Priority LOW 31CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Relevanssi Premium plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '_rt' parameter in all versions up to, and including, 2.31.4 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. This requires the click-tracking and logging feature to be activated in the plugin settings, and exploitation is trivially accessible to unauthenticated users because a valid _rt_nonce is publicly emitted on every search-results page.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00231 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
comesioRelevanssi Premiumup to 2.31.4—No fix listedCNA
  • Relevanssi Premium Vendorcomesio Affected up to 2.31.4 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-103426
  2. 2026-10-03 Alias added: GHSA-64c7-fgwg-hx23

References

Other 2

  • TI-2023-06585 Relevanssi (Free < 4.22.0, Premium < 2.25.0) - Unauthenticated Private/Draft Post Disclosure CVSS 3.1MEDIUM 5.3
  • TI-2024-01287 Missing authorization in comesio Relevanssi Premium CVSS 3.1MEDIUM 5.3
  • TI-2024-08374 Relevanssi < 4.23.1 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
  • TI-2024-03012 Relevanssi – A Better Search <= 4.22.1 - Unauthenticated Second Order CSV Injection CVSS 3.1CRITICAL 9.8
  • TI-2025-03923 Relevanssi <= 4.24.4 (Free) and <= 2.27.5 (Premium) - Unauthenticated SQL Injection CVSS 3.1HIGH 7.5
  • TI-2024-03011 Relevanssi – A Better Search <= 4.22.1 - Missing Authorization to Unauthenticated Count Option Update CVSS 3.1HIGH 8.2
See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences