CVE-2026-13457Network attack vectorHinoki check available

Unauthenticated credential disclosure via indexed migration artifacts

Published Aug 11, 2026 · Updated Aug 11, 2026

Information disclosure in InstaWP Connect 0.1.3.6 and earlier allows remote attackers to obtain database credentials during migration. An options-{migrate_key}.txt file in wp-content/instawpbackups embeds the key used to derive its AES-256-CBC passphrase, while the directory lacks listing controls. On Apache deployments with Options +Indexes enabled, attackers can enumerate the file during migration, decrypt it, and recover database access details and api_signature.

CVSS severity7.5
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in InstaWP Connect 0.1.3.6 and earlier allows remote attackers to obtain database credentials during migration. An options-{migrate_key}.txt file in wp-content/instawpbackups embeds the key used to derive its AES-256-CBC passphrase, while the directory lacks listing controls. On Apache deployments with Options +Indexes enabled, attackers can enumerate the file during migration, decrypt it, and recover database access details and api_signature.

The record

CVE
CVE-2026-13457
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
InstaWP
Product
InstaWP Connect
Classifications
CWE-434, T1552.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=0.1.3.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

InstaWP · InstaWP Connectversion=0 <=0.1.3.6

Published CVSS scores

7.5WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1552.001Credentials In Files

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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