CVE-2026-5399

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreHIGH confidence

Score 6.4 from GitHub Security Advisory published 2026-09-10. A secondary CVSS source baseline 6.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

The Redux Framework plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Slider field in User Profile settings in versions up to and including 4.5.13.1. This is due to insufficient input sanitization in the user_meta_save() function (which only sanitizes array values, not scalar values) and improper output escaping in the Redux_Slider::render() method, which outputs slider values into unquoted HTML attributes. The vulnerability also exploits the fact that the clean_default() method only casts values to numeric types when they are empty or out of bounds, allowing malicious strings like '1 tabindex=0 autofocus onfocus=alert(1) x=' to pass validation through PHP's loose type comparison. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts into their user profile that will execute whenever an Administrator navigates to view the attacker's profile page.

CVSS v3
6.4
EG Score
6.4MEDIUMhigh confidence
EG Risk
29
EG Risk 29/100CISA 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
Severity64% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
26th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

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 10, 2026

Last Modified

September 10, 2026

Advisory Details (1)

Auto-updated Sep 10, 2026
Patch available. Sources: github_pr.
github_pr Patch Available

Improve escaping and sanitization

Patch available: reduxframework/redux-framework 4.5.14 (PR #4112 merged 2026-09-09)

https://github.com/reduxframework/redux-framework/pull/4112/changes

Vendor Advisories for CVE-2026-5399(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 19× in last 7d / 74× 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. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 17:28 UTCGHSA enrichment
  3. 2026-10-03 19:08 UTCEG score recompute
  4. 2026-10-03 19:08 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 20:59 UTCEG score recompute
  7. 2026-10-02 20:59 UTCGHSA enrichment
  8. 2026-10-02 17:56 UTCEPSS rescore
  9. 2026-10-01 22:54 UTCEG score recompute
  10. 2026-10-01 22:54 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 00:48 UTCEG score recompute
  13. 2026-10-01 00:48 UTCGHSA enrichment
  14. 2026-09-30 15:03 UTCEPSS rescore
  15. 2026-09-30 01:58 UTCEG score recompute
  16. 2026-09-30 01:58 UTCGHSA enrichment
  17. 2026-09-29 01:13 UTCEG score recompute
  18. 2026-09-29 01:13 UTCGHSA enrichment
  19. 2026-09-28 13:51 UTCEPSS rescore
  20. 2026-09-28 03:07 UTCEG score recompute
  21. 2026-09-28 03:07 UTCGHSA enrichment
  22. 2026-09-27 05:02 UTCEG score recompute
  23. 2026-09-27 05:02 UTCGHSA enrichment
  24. 2026-09-26 15:59 UTCEPSS rescore
  25. 2026-09-26 06:53 UTCEG score recompute
Show 49 more
  1. 2026-09-26 06:53 UTCGHSA enrichment
  2. 2026-09-25 08:44 UTCEG score recompute
  3. 2026-09-25 08:44 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 10:38 UTCEG score recompute
  6. 2026-09-24 10:38 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 12:29 UTCEG score recompute
  9. 2026-09-23 12:29 UTCGHSA enrichment
  10. 2026-09-22 14:24 UTCEG score recompute
  11. 2026-09-22 14:24 UTCGHSA enrichment
  12. 2026-09-21 16:18 UTCEG score recompute
  13. 2026-09-21 16:18 UTCGHSA enrichment
  14. 2026-09-20 20:16 UTCEPSS rescore
  15. 2026-09-20 18:12 UTCGHSA enrichment
  16. 2026-09-19 20:07 UTCEG score recompute
  17. 2026-09-19 20:06 UTCGHSA enrichment
  18. 2026-09-18 22:00 UTCEG score recompute
  19. 2026-09-18 22:00 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-17 23:54 UTCEG score recompute
  22. 2026-09-17 23:54 UTCGHSA enrichment
  23. 2026-09-17 19:31 UTCEPSS rescore
  24. 2026-09-17 01:41 UTCEG score recompute
  25. 2026-09-17 01:41 UTCGHSA enrichment
  26. 2026-09-16 14:08 UTCEPSS rescore
  27. 2026-09-16 05:15 UTCEPSS rescore
  28. 2026-09-16 03:35 UTCGHSA enrichment
  29. 2026-09-15 05:29 UTCEG score recompute
  30. 2026-09-15 05:28 UTCGHSA enrichment
  31. 2026-09-15 03:11 UTCEPSS rescore
  32. 2026-09-14 07:20 UTCEG score recompute
  33. 2026-09-14 07:20 UTCGHSA enrichment
  34. 2026-09-13 16:47 UTCEPSS rescore
  35. 2026-09-13 09:14 UTCEG score recompute
  36. 2026-09-13 09:14 UTCGHSA enrichment
  37. 2026-09-12 11:09 UTCEG score recompute
  38. 2026-09-12 11:09 UTCGHSA enrichment
  39. 2026-09-11 14:53 UTCEPSS rescore
  40. 2026-09-11 13:03 UTCEG score recompute
  41. 2026-09-11 13:03 UTCGHSA enrichment
  42. 2026-09-10 14:57 UTCGHSA enrichment
  43. 2026-09-10 13:37 UTCEG score recompute
  44. 2026-09-10 13:37 UTCGHSA enrichment
  45. 2026-09-10 13:05 UTCEG score recompute
  46. 2026-09-10 13:05 UTCGHSA enrichment
  47. 2026-09-10 10:38 UTCEG score recompute
  48. 2026-09-10 09:40 UTCEG score recompute
  49. 2026-09-10 09:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-5399?
CVE-2026-5399 is a medium vulnerability published on September 10, 2026. The Redux Framework plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Slider field in User Profile settings in versions up to and including 4.5.13.1. This is due to insufficient input sanitization in the usermetasave() function (which only sanitizes array values, not scalar…
When was CVE-2026-5399 disclosed?
CVE-2026-5399 was first published on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5399 actively exploited?
CVE-2026-5399 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-5399?
CVE-2026-5399 has a CVSS base score of 6.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-5399?
A fix for CVE-2026-5399 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-5399 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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