CVE-2026-91072

MEDIUMPre-NVD 4.44.4—
EchelonGraph scoreHIGH confidence

Score 4.4 from GitHub Security Advisory published 2026-09-30. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
4.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.4Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

The EWWW Image Optimizer WordPress plugin before 8.8.0 does not confine a WebP-derivative file migration routine to the current site's own uploads directory, letting an attacker with Administrator-level access rename or delete existing WebP-derivative image files outside that scope, including, on a multisite network, files belonging to a different site they have no access to.

CVSS v3
4.4
EG Score
4.4MEDIUMhigh confidence
EG Risk
20
EG Risk 20/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity44% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 30, 2026

Last Modified

September 30, 2026

Advisory Details (1)

Auto-updated Sep 30, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

EWWW Image Optimizer < 8.8.0 – Admin+ WebP File Rename and Deletion via Unrestricted Path in WebP Migration Handler | CVE 2026-91072 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/c77770c5-d1af-47f6-9aee-a50d4a919732/

Vendor Advisories for CVE-2026-91072(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 17× in last 7d / 17× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-03 19:37 UTCEG score recompute
  2. 2026-10-03 19:37 UTCGHSA enrichment
  3. 2026-10-02 18:39 UTCEG score recompute
  4. 2026-10-02 18:39 UTCGHSA enrichment
  5. 2026-10-01 19:51 UTCEPSS rescore
  6. 2026-10-01 17:40 UTCGHSA enrichment
  7. 2026-09-30 16:41 UTCEG score recompute
  8. 2026-09-30 16:41 UTCGHSA enrichment
  9. 2026-09-30 15:04 UTCEPSS rescore
  10. 2026-09-30 14:29 UTCGHSA enrichment
  11. 2026-09-30 13:43 UTCEG score recompute▲ 4.40
  12. 2026-09-30 13:43 UTCGHSA enrichment
  13. 2026-09-30 13:41 UTCMITRE cvelistV5CVSS v3 → 4.4 · severity → MEDIUM
  14. 2026-09-30 06:34 UTCGHSA enrichment
  15. 2026-09-30 06:33 UTCNVD update
  16. 2026-09-30 06:15 UTCEG score recompute
  17. 2026-09-30 06:14 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91072?
CVE-2026-91072 is a medium vulnerability published on September 30, 2026. The EWWW Image Optimizer WordPress plugin before 8.8.0 does not confine a WebP-derivative file migration routine to the current site's own uploads directory, letting an attacker with Administrator-level access rename or delete existing WebP-derivative image files outside that scope, including, on a…
When was CVE-2026-91072 disclosed?
CVE-2026-91072 was first published on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91072 actively exploited?
CVE-2026-91072 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-91072?
CVE-2026-91072 has a CVSS v3.1 base score of 4.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-91072?
No fix for CVE-2026-91072 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-91072 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-91072

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