Read the docs
TI-2026-79567 Aliases CVE-2026-111737GHSA-hhfq-xfxp-vh74

Stored cross-site scripting in Speed Optimizer WordPress plugin

Priority LOW 16CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

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

Summary

The Speed Optimizer WordPress plugin before 7.8.5 does not sanitise or escape some of its settings before outputting them in the head of front-end pages. This is cross-site scripting (CWE-79) that lets a high-privilege user such as an admin store script that runs for visitors, even when the unfiltered_html capability is disallowed, for example in a multisite setup. An attacker needs high privileges and user interaction, and the impact is limited to low confidentiality and integrity loss. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

The Speed Optimizer WordPress plugin before 7.8.5 does not sanitise or escape some of its settings before outputting them in the head of front-end pages, which could allow high-privilege users such as admins to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in a multisite setup).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00185 8th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Speed Optimizer (Unknown): 7.8.5

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
UnknownSpeed Optimizerbefore 7.8.57.8.5Patch availableCNA
  • Speed Optimizer VendorUnknown Affected before 7.8.5 Fixed in 7.8.5 Patch available CNA

Remediation

Update the Speed Optimizer plugin to version 7.8.5 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Speed Optimizer (Unknown) Fixed in 7.8.5

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Speed Optimizer 7.8.5

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-79568 Incorrect authorization in Speed Optimizer allows network option changesPriority LOW 25
    Show all 2 records →

Timeline

  1. 2026-10-23 Threatist record created from CVE-2026-111737
  2. 2026-10-23 Alias added: GHSA-hhfq-xfxp-vh74
  3. 2026-10-23 CVSS score added · CISA ADP
  4. 2026-10-23 Weakness changed · CISA ADP
  5. 2026-10-23 CISA SSVC decision points changed

References

Exploit 1

Sources

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