CVE-2023-33185Public exploitNetwork attack vector

Authenticated forged webhook acceptance via untrusted certificates

Published May 26, 2023 · Updated Jan 14, 2025

Improper signature verification in django-ses before 3.5.0 allows remote authenticated users to submit forged SES/SNS webhook events. EventMessageVerifier accepts a SigningCertURL under any amazonaws.com subdomain, downloads that attacker-chosen certificate, and trusts it to verify the request signature. The default trusted-domain setting is exposed when SESEventWebhookView is routed; accepted events can reach application handlers or trigger blind SSRF.

CVSS severity4.6
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper signature verification in django-ses before 3.5.0 allows remote authenticated users to submit forged SES/SNS webhook events. EventMessageVerifier accepts a SigningCertURL under any amazonaws.com subdomain, downloads that attacker-chosen certificate, and trusts it to verify the request signature. The default trusted-domain setting is exposed when SESEventWebhookView is routed; accepted events can reach application handlers or trigger blind SSRF.

The record

CVE
CVE-2023-33185
Published
May 26, 2023
Updated
Jan 14, 2025
Vendor
django-ses
Product
django-ses
Classifications
CWE-347, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 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=< 3.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

django-ses · django-sesversion=< 3.5.0

Published CVSS scores

4.6GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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 exploitPublished

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1190Exploit Public-Facing Application

Public exploit references

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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