CVE-2025-10735Network attack vector

Unauthenticated blind SSRF via unchecked endpoint URL

Published Oct 1, 2025 · Updated Oct 1, 2025

Blind SSRF in bPlugins Block for Mailchimp 1.1.12 and earlier allows remote attackers to send server-side requests via a signup form. The mcbSubmit_Form_Data() AJAX handler accepts endpoint_url from a request, appends the audience identifier and members path, and passes the resulting URL to wp_safe_remote_post() without restricting it to Mailchimp endpoints. Access requires a valid public form nonce and a destination reachable from the WordPress host; successful requests can query or modify internal services without returning their responses.

CVSS severity4.0
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Blind SSRF in bPlugins Block for Mailchimp 1.1.12 and earlier allows remote attackers to send server-side requests via a signup form. The mcbSubmit_Form_Data() AJAX handler accepts endpoint_url from a request, appends the audience identifier and members path, and passes the resulting URL to wp_safe_remote_post() without restricting it to Mailchimp endpoints. Access requires a valid public form nonce and a destination reachable from the WordPress host; successful requests can query or modify internal services without returning their responses.

The record

CVE
CVE-2025-10735
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
bPlugins
Product
Block for Mailchimp
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record 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=* <=1.1.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

bPlugins · Block for Mailchimpversion=* <=1.1.12

Published CVSS scores

4.0WordfenceCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

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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