CVE-2026-15604

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreMEDIUM confidence

Score 6.4 from GitHub Security Advisory published 2026-08-16. 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

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

The Toocheke Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.10 via the 'series_bg_color' post meta field. This is due to insufficient input sanitization in the toocheke_series_bg_color_save() function (which stores the raw $_POST value in post meta) and insufficient output escaping in the series admin column rendering (where the stored value is concatenated into a style attribute without esc_attr()). This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user, such as an administrator, accesses the series list table in the admin dashboard.

CVSS v3
6.4
EG Score
6.4MEDIUMmedium 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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
24th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

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

August 16, 2026

Last Modified

August 20, 2026

References (5)

Vendor Advisories for CVE-2026-15604(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 16× in last 7d / 72× 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.

Showing the most recent 100 of 133 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15604?
CVE-2026-15604 is a medium vulnerability published on August 16, 2026. The Toocheke Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.10 via the 'seriesbgcolor' post meta field. This is due to insufficient input sanitization in the toochekeseriesbgcolorsave() function (which stores the raw $POST value in…
When was CVE-2026-15604 disclosed?
CVE-2026-15604 was first published on August 16, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15604 actively exploited?
CVE-2026-15604 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15604?
CVE-2026-15604 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-2026-15604?
No fix for CVE-2026-15604 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-15604 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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