CVE-2026-13457

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-11. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

The InstaWP Connect – 1-click WP Staging & Migration plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 0.1.3.6 via the (top-level script) function. This is due to the plugin stores its encrypted options file as options-{migrate_key}.txt in wp-content/instawpbackups/ without deploying an index.php or .htaccess to prevent directory listing, exposing the 40-character migrate_key on Apache servers with directory indexing enabled, which allows an attacker to derive the AES-256-CBC passphrase via SHA256(migrate_key), decrypt the options file to recover the api_signature. This makes it possible for unauthenticated attackers to get the database access details and api_signature. Exploitation requires the target WordPress site to be hosted on Apache with directory listing enabled (Options +Indexes) for the wp-content/instawpbackups/ directory, and time limited because it can only be exploited during the migration period.

CVSS v3
7.5
EG Score
7.5(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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 12, 2026

References (3)

Vendor Advisories for CVE-2026-13457(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 21× in last 7d / 102× 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 148 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13457?
CVE-2026-13457 is a high vulnerability published on August 11, 2026. The InstaWP Connect – 1-click WP Staging & Migration plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 0.1.3.6 via the (top-level script) function. This is due to the plugin stores its encrypted options file as options-{migratekey}.txt in…
When was CVE-2026-13457 disclosed?
CVE-2026-13457 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13457 actively exploited?
CVE-2026-13457 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 51.5% of all scored CVEs.
What is the CVSS score of CVE-2026-13457?
CVE-2026-13457 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-13457?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13457, 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.

Dependency Blast Radius

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