CVE-2026-78273

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory published 2026-08-27. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.5Exploit: None knownExposed services: Not assessed

Update the WordPress Fluent Boards Pro Plugin to the latest available version (at least 2.0.12) (from the CVE record's solution, Patchstack) — apply it.

Subscriber Cross Site Scripting (XSS) in Fluent Boards Pro <= 2.0.11 versions.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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 (value × EchelonGraph’s weight)
Severity65% × 45%
The EG Score, 6.5 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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: Update the WordPress Fluent Boards Pro Plugin to the latest available version (at least 2.0.12) (from the CVE record's solution, Patchstack). Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
12th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

Update the WordPress Fluent Boards Pro Plugin to the latest available version (at least 2.0.12) (from the CVE record's solution, Patchstack). Apply it within your standard update timelines.

Exploitation none (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

August 27, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 27, 2026
Fix named in the CVE record's solution (Patchstack).
Web page

Cross Site Scripting (XSS) in WordPress Fluent Boards Pro Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/fluent-boards-pro/vulnerability/wordpress-fluent-boards-pro-plugin-2-0-11-cross-site-scripting-xss-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-78273(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 / 82× 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 98 of 137 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 39 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-10-12 15:36 UTCEG score recompute
  4. 2026-10-11 19:23 UTCEG score recompute
  5. 2026-10-11 16:38 UTCEG score recompute
  6. 2026-10-11 13:57 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-10-10 09:48 UTCEG score recompute
  10. 2026-10-10 09:48 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-09 08:26 UTCEG score recompute
  13. 2026-10-09 08:26 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-08 09:52 UTCEG score recompute
  16. 2026-10-08 09:52 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  18. 2026-10-07 11:18 UTCEG score recompute
  19. 2026-10-07 11:18 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-10-06 12:44 UTCEG score recompute
  22. 2026-10-06 12:44 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-10-05 14:11 UTCEG score recompute
  25. 2026-10-05 14:11 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
Show 73 more
  1. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-04 15:34 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  3. 2026-10-03 17:00 UTCEG score recompute
  4. 2026-10-03 17:00 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  5. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  6. 2026-10-02 18:27 UTCEG score recompute
  7. 2026-10-02 18:27 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  8. 2026-10-01 19:54 UTCEG score recompute
  9. 2026-10-01 19:54 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  10. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-09-30 19:55 UTCEG score recompute
  12. 2026-09-30 19:55 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  13. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-09-29 15:02 UTCEG score recompute
  15. 2026-09-29 15:02 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  16. 2026-09-28 16:26 UTCEG score recompute
  17. 2026-09-28 16:26 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  18. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-09-27 17:53 UTCEG score recompute
  20. 2026-09-27 17:53 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-09-26 19:19 UTCEG score recompute
  23. 2026-09-26 19:19 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  26. 2026-09-25 01:50 UTCEG score recompute
  27. 2026-09-25 01:50 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  28. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  29. 2026-09-24 03:16 UTCEG score recompute
  30. 2026-09-24 03:16 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  31. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  32. 2026-09-23 04:43 UTCEG score recompute
  33. 2026-09-23 04:43 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  34. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  35. 2026-09-22 06:09 UTCEG score recompute
  36. 2026-09-22 06:09 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  37. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  38. 2026-09-21 07:35 UTCEG score recompute
  39. 2026-09-21 07:35 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  40. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  41. 2026-09-20 08:48 UTCEG score recompute
  42. 2026-09-20 08:48 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  43. 2026-09-19 10:12 UTCEG score recompute
  44. 2026-09-19 10:12 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  45. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  46. 2026-09-18 11:39 UTCEG score recompute
  47. 2026-09-18 11:39 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  48. 2026-09-17 13:05 UTCEG score recompute
  49. 2026-09-17 13:05 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  50. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  51. 2026-09-16 14:08 UTCEG score recompute
  52. 2026-09-16 14:08 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  53. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  54. 2026-09-15 15:27 UTCEG score recompute
  55. 2026-09-15 15:27 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  56. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  57. 2026-09-14 16:50 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  58. 2026-09-13 18:17 UTCEG score recompute
  59. 2026-09-13 18:17 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  60. 2026-09-12 19:43 UTCEG score recompute
  61. 2026-09-12 19:43 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  62. 2026-09-11 21:09 UTCEG score recompute
  63. 2026-09-11 21:09 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  64. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  65. 2026-09-10 22:35 UTCEG score recompute
  66. 2026-09-10 22:35 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  67. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  68. 2026-09-10 00:01 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  69. 2026-09-09 00:43 UTCEG score recompute
  70. 2026-09-09 00:43 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5
  71. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  72. 2026-09-07 23:39 UTCEG score recompute
  73. 2026-09-07 23:38 UTCGHSA enrichmentGHSA-6mfc-34v4-rx97 · GitHub CVSS 6.5

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78273?
CVE-2026-78273 is a medium-severity vulnerability; its CVE record was published on August 27, 2026. Subscriber Cross Site Scripting (XSS) in Fluent Boards Pro <= 2.0.11 versions.
When was the CVE record for CVE-2026-78273 published?
The CVE record for CVE-2026-78273 was published on August 27, 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 August 28, 2026; the record at its source may have been updated since.
Is CVE-2026-78273 actively exploited?
CVE-2026-78273 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-78273?
CVE-2026-78273 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-78273?
The CVE record's solution for CVE-2026-78273, written by its CNA Patchstack, names the fix: "Update the WordPress Fluent Boards Pro Plugin to the latest available version (at least 2.0.12)." The vendor advisories EchelonGraph has for CVE-2026-78273 are linked in the Vendor Advisories panel on this page.

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