CVE-2026-57621

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-02. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Unauthenticated PHP Object Injection in Booktics <= 1.0.21 versions.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

July 2, 2026

Last Modified

July 2, 2026

Advisory Details (1)

Auto-updated Sep 20, 2026
No patch confirmed yet.
generic

PHP Object Injection in WordPress Booktics Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/booktics/vulnerability/wordpress-booktics-plugin-1-0-21-php-object-injection-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-57621(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 9× in last 7d / 71× 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 403 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-57621?
CVE-2026-57621 is a critical vulnerability published on July 2, 2026. Unauthenticated PHP Object Injection in Booktics <= 1.0.21 versions.
When was CVE-2026-57621 disclosed?
CVE-2026-57621 was first published in the National Vulnerability Database on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57621 actively exploited?
CVE-2026-57621 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.4% of all scored CVEs.
What is the CVSS score of CVE-2026-57621?
CVE-2026-57621 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-57621?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57621, 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.

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