CVE-2026-5337

MEDIUMNVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 6.5 from GitHub Security Advisory published 2026-05-03. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated

Also known asEUVD-2026-26818 (ENISA EUVD) · GHSA-2gvx-55m9-gpjj (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.5Exploit: No code on recordExposed services: Not assessed

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

The CVE record's CNA (WPScan) lists Frontend File Manager Plugin versions up to and including 23.6 as affected. No release containing a fix is confirmed on record.

During the analysis, it was identified that authenticated attackers with Subscriber-level access or higher are able to perform an Insecure Direct Object Reference (IDOR) attack. This vulnerability exists because the Frontend File Manager Plugin WordPress plugin through 23.6 does not properly validate user authorization for the requested uploaded file when processing download requests. By modifying the value of the 'file_id' parameter in the download endpoint (e.g., http://localhost/?do=wpfm_download&file_id=40&nm_file_nonce=a36fb893f1), an attacker can access files belonging to other users, including privileged users such as administrators. This allows unauthorized access/read to sensitive data stored within the application.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
45
EG Risk 45/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines, and watch for a fix.
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines, and watch for a fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 3, 2026

Last Modified

May 4, 2026

Advisory Details (1)

Auto-updated May 4, 2026
No fix on record yet.
Web page

Frontend File Manager Plugin <= 23.6 – Subscriber+ Arbitrary Download Access via IDOR | CVE 2026-5337 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/3e28aa78-3227-474a-b1db-1f5ea2c42d14/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 37× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 228 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 128 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  6. 2026-10-25 14:20 UTCEG score recompute
  7. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  8. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  9. 2026-10-22 21:49 UTCEG score recompute
  10. 2026-10-22 21:49 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  11. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  12. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  13. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  14. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  15. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  16. 2026-10-18 03:31 UTCEG score recompute
  17. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  18. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  20. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  22. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-10-12 15:57 UTCEG score recompute
  24. 2026-10-11 19:40 UTCEG score recompute
  25. 2026-10-11 16:55 UTCEG score recompute
Show 75 more
  1. 2026-10-11 14:19 UTCEG score recompute
  2. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  4. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  5. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  6. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  7. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  8. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  9. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  10. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  11. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  12. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  13. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  14. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  16. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  17. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  18. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  26. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  27. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  28. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  29. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  30. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  31. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  32. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  33. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  34. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  35. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  36. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  37. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  38. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  39. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  40. 2026-08-23 21:39 UTCEG score recompute
  41. 2026-08-23 21:39 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  42. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  43. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  44. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  45. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  46. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  47. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  48. 2026-08-17 13:15 UTCEG score recompute
  49. 2026-08-17 13:15 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  50. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  51. 2026-08-16 05:08 UTCEG score recompute
  52. 2026-08-16 05:08 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  53. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  54. 2026-08-14 03:41 UTCEG score recompute
  55. 2026-08-14 03:41 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  56. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  57. 2026-08-12 17:20 UTCEG score recompute
  58. 2026-08-12 17:20 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  59. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  60. 2026-08-11 08:56 UTCEG score recompute
  61. 2026-08-11 08:56 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  62. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  63. 2026-08-10 07:17 UTCEG score recompute
  64. 2026-08-10 07:17 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  65. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  66. 2026-08-09 05:39 UTCEG score recompute
  67. 2026-08-09 05:39 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  68. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  69. 2026-08-08 04:01 UTCEG score recompute
  70. 2026-08-08 04:01 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  71. 2026-08-07 02:22 UTCEG score recompute
  72. 2026-08-07 02:22 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5
  73. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  74. 2026-08-05 22:32 UTCEG score recompute
  75. 2026-08-05 22:32 UTCGHSA enrichmentGHSA-2gvx-55m9-gpjj · GitHub CVSS 6.5

Frequently asked(5)

What is CVE-2026-5337?
CVE-2026-5337 is a medium-severity vulnerability; its CVE record was published on May 3, 2026. During the analysis, it was identified that authenticated attackers with Subscriber-level access or higher are able to perform an Insecure Direct Object Reference (IDOR) attack. This vulnerability exists because the Frontend File Manager Plugin WordPress plugin through 23.6 does not properly…
When was the CVE record for CVE-2026-5337 published?
The CVE record for CVE-2026-5337 was published on May 3, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of May 4, 2026; the record at its source may have been updated since.
Is CVE-2026-5337 actively exploited?
CVE-2026-5337 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-5337?
CVE-2026-5337 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-5337?
No fix for CVE-2026-5337 is confirmed yet. Until one is published, restrict network exposure of the affected system — for example, keep it off the internet or limit it to trusted networks — and watch for a fix. The CVE record's CNA (WPScan) lists Frontend File Manager Plugin versions up to and including 23.6 as affected. No release containing a fix is confirmed on record.

Dependency Blast Radius

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