CVE-2026-1857Network attack vector

Authenticated data disclosure via unchecked GetResponse endpoint

Published Feb 18, 2026 · Updated Feb 18, 2026

SSRF in Kadence Blocks 3.6.1 and earlier allows remote authenticated users to retrieve GetResponse data through a crafted endpoint. The get_items() method accepts the endpoint parameter without restricting it and sends a server-side request with the site's stored GetResponse API key in the headers. Contributor-level edit_posts access and a configured GetResponse integration are required, exposing contacts, campaigns, mailing lists, and the API key.

CVSS severity4.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Kadence Blocks 3.6.1 and earlier allows remote authenticated users to retrieve GetResponse data through a crafted endpoint. The get_items() method accepts the endpoint parameter without restricting it and sends a server-side request with the site's stored GetResponse API key in the headers. Contributor-level edit_posts access and a configured GetResponse integration are required, exposing contacts, campaigns, mailing lists, and the API key.

The record

CVE
CVE-2026-1857
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
Liquid Web
Product
Kadence Blocks
Classifications
CWE-918, T1528
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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=* <=3.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Liquid Web · Kadence Blocksversion=* <=3.6.1

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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