CVE-2026-78363

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreHIGH confidence

Score 4.8 from GitHub Security Advisory published 2026-09-01. a secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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 MW WP Form WordPress plugin before 5.1.5 does not prevent shortcodes in user-submitted values from being executed when it merges those values into a message that it later processes for shortcodes, allowing unauthenticated users to run any shortcode registered on the site. Exploitation requires the site to have been configured to echo a submitted value back to the visitor after submission.

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
14%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Sep 1, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

MW WP Form < 5.1.5 – Unauthenticated Arbitrary Shortcode Execution via Completion Message Merge Tags | CVE 2026-78363 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/0569c5f7-2001-4364-a68b-451b73f3a32a/

Vendor Advisories for CVE-2026-78363(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 / 67× 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. 2026-09-25 00:11 UTCEG score recompute
  2. 2026-09-25 00:11 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 00:01 UTCEG score recompute
  5. 2026-09-24 00:01 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 00:00 UTCEG score recompute
  8. 2026-09-23 00:00 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 00:00 UTCEG score recompute
  11. 2026-09-22 00:00 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-20 23:59 UTCEG score recompute
  14. 2026-09-20 23:59 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-19 23:58 UTCEG score recompute
  17. 2026-09-19 23:58 UTCGHSA enrichment
  18. 2026-09-18 23:58 UTCEG score recompute
  19. 2026-09-18 23:58 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-17 23:58 UTCEG score recompute
  22. 2026-09-17 23:58 UTCGHSA enrichment
  23. 2026-09-16 23:55 UTCEG score recompute
  24. 2026-09-16 23:55 UTCGHSA enrichment
  25. 2026-09-16 14:08 UTCEPSS rescore
Show 42 more
  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-15 23:55 UTCEG score recompute
  3. 2026-09-15 23:55 UTCGHSA enrichment
  4. 2026-09-15 03:12 UTCEPSS rescore
  5. 2026-09-15 03:12 UTCEPSS rescore
  6. 2026-09-14 23:55 UTCGHSA enrichment
  7. 2026-09-13 23:55 UTCEG score recompute
  8. 2026-09-13 23:55 UTCGHSA enrichment
  9. 2026-09-12 23:55 UTCEG score recompute
  10. 2026-09-12 23:55 UTCGHSA enrichment
  11. 2026-09-11 23:55 UTCEG score recompute
  12. 2026-09-11 23:55 UTCGHSA enrichment
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-10 23:55 UTCEG score recompute
  16. 2026-09-10 23:55 UTCGHSA enrichment
  17. 2026-09-10 09:35 UTCEPSS rescore
  18. 2026-09-09 23:40 UTCGHSA enrichment
  19. 2026-09-08 23:27 UTCGHSA enrichment
  20. 2026-09-07 21:07 UTCEG score recompute
  21. 2026-09-07 21:07 UTCGHSA enrichment
  22. 2026-09-06 21:07 UTCEG score recompute
  23. 2026-09-06 21:07 UTCGHSA enrichment
  24. 2026-09-06 13:48 UTCEPSS rescore
  25. 2026-09-05 21:03 UTCGHSA enrichment
  26. 2026-09-04 21:03 UTCEG score recompute
  27. 2026-09-04 21:03 UTCGHSA enrichment
  28. 2026-09-04 05:07 UTCEPSS rescore
  29. 2026-09-03 21:01 UTCGHSA enrichment
  30. 2026-09-02 21:01 UTCEG score recompute
  31. 2026-09-02 21:01 UTCGHSA enrichment
  32. 2026-09-02 14:12 UTCEPSS rescore
  33. 2026-09-01 20:59 UTCEG score recompute
  34. 2026-09-01 20:59 UTCGHSA enrichment
  35. 2026-09-01 13:54 UTCEPSS rescore
  36. 2026-09-01 13:42 UTCEG score recompute
  37. 2026-09-01 13:42 UTCGHSA enrichment
  38. 2026-09-01 12:49 UTCEG score recompute
  39. 2026-09-01 12:49 UTCGHSA enrichment
  40. 2026-09-01 08:19 UTCEG score recompute
  41. 2026-09-01 07:48 UTCEG score recompute
  42. 2026-09-01 07:47 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78363?
CVE-2026-78363 is a medium vulnerability published on September 1, 2026. The MW WP Form WordPress plugin before 5.1.5 does not prevent shortcodes in user-submitted values from being executed when it merges those values into a message that it later processes for shortcodes, allowing unauthenticated users to run any shortcode registered on the site. Exploitation requires…
When was CVE-2026-78363 disclosed?
CVE-2026-78363 was first published in the National Vulnerability Database on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78363 actively exploited?
CVE-2026-78363 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 86.3% of all scored CVEs.
What is the CVSS score of CVE-2026-78363?
CVE-2026-78363 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-78363?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78363, 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

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