CVE-2023-6696Network attack vector

Subscriber data deletion and blind SSRF via AJAX

Published Jun 15, 2024 · Updated Apr 8, 2026

Missing authorization in Sygnoos Popup Builder 4.3.1 and earlier allows remote authenticated users to delete subscribers or trigger blind SSRF. AJAX handlers in com/classes/Ajax.php accept subscriber-level requests without capability checks, while protected handlers rely on nonces exposed on profile pages. A subscriber account is required, and successful requests can delete subscriber records or make the server issue attacker-chosen outbound requests without returning their responses.

CVSS severity8.1
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Sygnoos Popup Builder 4.3.1 and earlier allows remote authenticated users to delete subscribers or trigger blind SSRF. AJAX handlers in com/classes/Ajax.php accept subscriber-level requests without capability checks, while protected handlers rely on nonces exposed on profile pages. A subscriber account is required, and successful requests can delete subscriber records or make the server issue attacker-chosen outbound requests without returning their responses.

The record

CVE
CVE-2023-6696
Published
Jun 15, 2024
Updated
Apr 8, 2026
Vendor
Sygnoos
Product
Popup Builder
Classifications
CWE-862, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=4.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sygnoos · Popup Builderversion=0 <=4.3.1

Published CVSS scores

8.1NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8.1WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
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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