techjewel FluentCRM Plugin up to 2.9.87 on WordPress _fc_bounce_key SubscribeURL server-side request forgery

Summaryinfo

A vulnerability classified as critical has been found in techjewel FluentCRM Plugin up to 2.9.87 on WordPress. This affects the function _fc_bounce_key. Performing a manipulation of the argument SubscribeURL results in server-side request forgery. This vulnerability is known as CVE-2026-7798. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in techjewel FluentCRM Plugin up to 2.9.87 on WordPress. This affects the function _fc_bounce_key. The manipulation of the argument SubscribeURL with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The FluentCRM – Email Newsletter, Automation, Email Marketing, Email Campaigns, Optins, Leads, and CRM Solution plugin for WordPress is vulnerable to Blind Server-Side Request Forgery in all versions up to, and including, 2.9.87 via the 'SubscribeURL' parameter. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services. Exploitation requires that the SES bounce handling key ('_fc_bounce_key') has never been stored (i.e., the site is in its default/unconfigured state with respect to SES bounce handling) as visiting the bounce configuration page auto-generates and stores a random key that causes the authentication check to evaluate correctly and reject unauthenticated requests.

The weakness was published by Saleh Elsayed. It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-7798 since 05/04/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 2.9.87 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-31418). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• techjewel

Name

• FluentCRM Plugin

Version

• 2.9.0
• 2.9.1
• 2.9.2
• 2.9.3
• 2.9.4
• 2.9.5
• 2.9.6
• 2.9.7
• 2.9.8
• 2.9.9
• 2.9.10
• 2.9.11
• 2.9.12
• 2.9.13
• 2.9.14
• 2.9.15
• 2.9.16
• 2.9.17
• 2.9.18
• 2.9.19
• 2.9.20
• 2.9.21
• 2.9.22
• 2.9.23
• 2.9.24
• 2.9.25
• 2.9.26
• 2.9.27
• 2.9.28
• 2.9.29
• 2.9.30
• 2.9.31
• 2.9.32
• 2.9.33
• 2.9.34
• 2.9.35
• 2.9.36
• 2.9.37
• 2.9.38
• 2.9.39
• 2.9.40
• 2.9.41
• 2.9.42
• 2.9.43
• 2.9.44
• 2.9.45
• 2.9.46
• 2.9.47
• 2.9.48
• 2.9.49
• 2.9.50
• 2.9.51
• 2.9.52
• 2.9.53
• 2.9.54
• 2.9.55
• 2.9.56
• 2.9.57
• 2.9.58
• 2.9.59
• 2.9.60
• 2.9.61
• 2.9.62
• 2.9.63
• 2.9.64
• 2.9.65
• 2.9.66
• 2.9.67
• 2.9.68
• 2.9.69
• 2.9.70
• 2.9.71
• 2.9.72
• 2.9.73
• 2.9.74
• 2.9.75
• 2.9.76
• 2.9.77
• 2.9.78
• 2.9.79
• 2.9.80
• 2.9.81
• 2.9.82
• 2.9.83
• 2.9.84
• 2.9.85
• 2.9.86
• 2.9.87

CPE 2.3info

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CPE 2.2info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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