CVE-2026-13457

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH 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(high)
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
47%
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 28× in last 7d / 42× 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.

  1. 2026-08-21 02:24 UTCEG score recompute
  2. 2026-08-21 02:24 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 14:06 UTCGHSA enrichment
  5. 2026-08-20 01:44 UTCEG score recompute
  6. 2026-08-20 01:44 UTCGHSA enrichment
  7. 2026-08-19 17:03 UTCEPSS rescore
  8. 2026-08-19 13:25 UTCGHSA enrichment
  9. 2026-08-19 01:02 UTCEG score recompute
  10. 2026-08-19 01:02 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-18 12:45 UTCGHSA enrichment
  13. 2026-08-18 00:02 UTCEG score recompute
  14. 2026-08-18 00:02 UTCGHSA enrichment
  15. 2026-08-17 11:44 UTCGHSA enrichment
  16. 2026-08-16 23:24 UTCEG score recompute
  17. 2026-08-16 23:24 UTCGHSA enrichment
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 11:06 UTCEG score recompute
  20. 2026-08-16 11:06 UTCGHSA enrichment
  21. 2026-08-16 02:14 UTCEPSS rescore
  22. 2026-08-15 22:49 UTCGHSA enrichment
  23. 2026-08-15 10:31 UTCEG score recompute
  24. 2026-08-15 10:31 UTCGHSA enrichment
  25. 2026-08-15 01:30 UTCEPSS rescore
Show 17 more
  1. 2026-08-14 22:13 UTCGHSA enrichment
  2. 2026-08-14 09:56 UTCEG score recompute
  3. 2026-08-14 09:56 UTCGHSA enrichment
  4. 2026-08-13 22:00 UTCEPSS rescore
  5. 2026-08-13 21:38 UTCGHSA enrichment
  6. 2026-08-13 09:21 UTCGHSA enrichment
  7. 2026-08-12 21:04 UTCGHSA enrichment
  8. 2026-08-12 14:23 UTCEG score recompute
  9. 2026-08-12 14:23 UTCGHSA enrichment
  10. 2026-08-12 13:50 UTCEPSS rescore
  11. 2026-08-12 13:25 UTCEG score recompute
  12. 2026-08-12 13:25 UTCGHSA enrichment
  13. 2026-08-12 08:37 UTCEG score recompute
  14. 2026-08-12 08:37 UTCGHSA enrichment
  15. 2026-08-11 20:19 UTCEG score recompute
  16. 2026-08-11 19:51 UTCEG score recompute
  17. 2026-08-11 19:50 UTCMITRE cvelistV5first tracked

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 52.7% 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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