CVE-2021-3376Public exploitNetwork attack vector

Authenticated Super Admin escalation via profile update

Published Dec 14, 2021 · Updated Aug 3, 2024

Privilege escalation in Cuppa CMS before 31 Jan 2021 allows remote authenticated users to gain Super Admin access via a crafted POST request. The Profile function processes a client-added user_group_id_field value of 1 during an account update, assigning the account to the Super Admin group. A low-privilege account and access to the profile update are required; successful exploitation grants full administrative control of the CMS.

CVSS severity8.8
High
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Cuppa CMS before 31 Jan 2021 allows remote authenticated users to gain Super Admin access via a crafted POST request. The Profile function processes a client-added user_group_id_field value of 1 during an account update, assigning the account to the Super Admin group. A low-privilege account and access to the profile update are required; successful exploitation grants full administrative control of the CMS.

The record

CVE
CVE-2021-3376
Published
Dec 14, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1098Account Manipulation

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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