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TI-2026-61864 Aliases CVE-2026-91051GHSA-rhvr-pxgv-9rpq

EWWW Image Optimizer 8.6.0 - 8.7.7 - Author+ PHP Object Injection via 'eio_page_settings' Post Meta

Priority LOW 31CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-502.

Summary

The EWWW Image Optimizer WordPress plugin before 8.8.0 does not prevent authenticated users with author-level permissions from storing a serialized value in a post meta field that is deserialized when the post is rendered, allowing them to perform PHP Object Injection, which can lead to remote code execution when a suitable gadget chain is present via another installed EWWW Image Optimizer WordPress plugin before 8.8.0 or .

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0034 27th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed EWWW Image Optimizer (Unknown): 8.8.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownEWWW Image Optimizer8.6.0 to before 8.8.08.8.0Patch availableCNA
  • EWWW Image Optimizer VendorUnknown Affected 8.6.0 to before 8.8.0 Fixed in 8.8.0 Patch available CNA

Remediation

  • Fix · CNA EWWW Image Optimizer (Unknown) Fixed in 8.8.0

Fixed in the same release

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

  • Release ·

    EWWW Image Optimizer 8.8.0

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-61865 EWWW Image Optimizer < 8.8.0 - Admin+ WebP File Rename and Deletion via Unrestricted Path in WebP Migration HandlerPriority LOW 20
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-91051
  2. 2026-10-03 Alias added: GHSA-rhvr-pxgv-9rpq

References

Exploit 1

Sources

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