CVE-2026-73380

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-18. 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 Popup by Supsystic <= 1.13.0 versions.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 20, 2026

Advisory Details (1)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic

PHP Object Injection in WordPress Popup by Supsystic Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/popup-by-supsystic/vulnerability/wordpress-popup-by-supsystic-plugin-1-13-0-php-object-injection-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-73380(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 50× in last 7d / 218× 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 252 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73380?
CVE-2026-73380 is a critical vulnerability published on August 18, 2026. Unauthenticated PHP Object Injection in Popup by Supsystic <= 1.13.0 versions.
When was CVE-2026-73380 disclosed?
CVE-2026-73380 was first published in the National Vulnerability Database on August 18, 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-2026-73380 actively exploited?
CVE-2026-73380 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 56.5% of all scored CVEs.
What is the CVSS score of CVE-2026-73380?
CVE-2026-73380 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-73380?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73380, 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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