CVE-2026-16953

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreHIGH confidence

Score 4.8 from GitHub Security Advisory published 2026-08-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: None knownExposed: 0

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

The AI Engine WordPress plugin before 3.6.4 does not verify ownership of a guest's uploaded chatbot files before deletion, authorising the action solely by a client-supplied session cookie value, so an unauthenticated attacker who obtains a victim's session identifier and file reference can delete that victim's uploaded files.

CVSS v3
4.8
EG Score
4.8(high)
EG Risk
22(Track)
EG Risk 22/100SSVC: Track

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
Severity48% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

August 8, 2026

Last Modified

August 11, 2026

Advisory Details (1)

Auto-updated Aug 11, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

AI Engine < 3.6.4 – Unauthenticated Cross-Session Chatbot File Deletion via Forgeable Session Cookie | CVE 2026-16953 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/8f5460a7-9764-4ce1-9cb4-8202b192765d/

Vendor Advisories for CVE-2026-16953(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 20× in last 7d / 37× 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. 2026-08-21 09:14 UTCEG score recompute
  2. 2026-08-21 09:14 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 07:49 UTCEG score recompute
  5. 2026-08-20 07:49 UTCGHSA enrichment
  6. 2026-08-19 17:03 UTCEPSS rescore
  7. 2026-08-19 06:23 UTCEG score recompute
  8. 2026-08-19 06:23 UTCGHSA enrichment
  9. 2026-08-18 13:48 UTCEPSS rescore
  10. 2026-08-18 04:52 UTCEG score recompute
  11. 2026-08-18 04:52 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 03:27 UTCEG score recompute
  14. 2026-08-17 03:27 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-16 02:02 UTCEG score recompute
  18. 2026-08-16 02:02 UTCGHSA enrichment
  19. 2026-08-15 01:30 UTCEPSS rescore
  20. 2026-08-15 00:36 UTCGHSA enrichment
  21. 2026-08-13 23:11 UTCGHSA enrichment
  22. 2026-08-12 21:45 UTCEG score recompute
  23. 2026-08-12 21:45 UTCGHSA enrichment
  24. 2026-08-12 13:50 UTCEPSS rescore
  25. 2026-08-11 20:20 UTCGHSA enrichment
Show 12 more
  1. 2026-08-11 19:51 UTCEG score recompute▲ 4.80
  2. 2026-08-11 19:51 UTCGHSA enrichment
  3. 2026-08-11 19:50 UTCMITRE cvelistV5CVSS v3 → 4.8 · severity → MEDIUM
  4. 2026-08-11 13:42 UTCEPSS rescore
  5. 2026-08-11 13:30 UTCEG score recompute
  6. 2026-08-11 13:30 UTCGHSA enrichment
  7. 2026-08-11 00:00 UTCEPSS rescore
  8. 2026-08-09 13:46 UTCEPSS rescore
  9. 2026-08-08 16:37 UTCEPSS rescore
  10. 2026-08-08 07:19 UTCNVD update
  11. 2026-08-08 06:22 UTCEG score recompute
  12. 2026-08-08 06:22 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-16953?
CVE-2026-16953 is a medium vulnerability published on August 8, 2026. The AI Engine WordPress plugin before 3.6.4 does not verify ownership of a guest's uploaded chatbot files before deletion, authorising the action solely by a client-supplied session cookie value, so an unauthenticated attacker who obtains a victim's session identifier and file reference can delete…
When was CVE-2026-16953 disclosed?
CVE-2026-16953 was first published in the National Vulnerability Database on August 8, 2026, with the most recent update on August 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16953 actively exploited?
CVE-2026-16953 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.2% of all scored CVEs.
What is the CVSS score of CVE-2026-16953?
CVE-2026-16953 has a CVSS v3.1 base score of 4.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16953?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16953, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-16953

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