CVE-2021-34648Network attack vector

Authenticated arbitrary email via login-only REST authorization

Published Sep 22, 2021 · Updated Mar 31, 2025

Incorrect authorization in Saturday Drive Ninja Forms 3.5.7 and earlier allows remote authenticated users to send arbitrary email. The email-action REST route accepts any logged-in user because its permission callback checks only login status, while trigger_email_action builds the recipient, subject, and body from request values. Any WordPress account can abuse the site's mail identity to send attacker-chosen messages to arbitrary recipients for phishing.

CVSS severity6.4
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Saturday Drive Ninja Forms 3.5.7 and earlier allows remote authenticated users to send arbitrary email. The email-action REST route accepts any logged-in user because its permission callback checks only login status, while trigger_email_action builds the recipient, subject, and body from request values. Any WordPress account can abuse the site's mail identity to send attacker-chosen messages to arbitrary recipients for phishing.

The record

CVE
CVE-2021-34648
Published
Sep 22, 2021
Updated
Mar 31, 2025
Vendor
Saturday Drive
Product
Ninja Forms
Classifications
CWE-862, CWE-863, T1566.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 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=3.5.7 <=3.5.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Saturday Drive · Ninja Formsversion=3.5.7 <=3.5.7

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:N/I:P/A:N
6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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.

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
CWE-863Incorrect Authorization
T1566.002Spearphishing Link

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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