CVE-2021-32691Network attack vector

Unauthenticated account takeover via person auto-merging

Published Jun 16, 2021 · Updated Aug 3, 2024

Improper authentication in Apollos Apps before 2.20.0 allows remote attackers to take over accounts using basic profile details. The People.create data source sent name, birthday, and gender in the initial Rock /People request, allowing Rock's auto-merge to bind a new registration to an existing person. Unauthenticated registration and knowledge of a person's basic profile are sufficient to access app functions and authenticated Rock-based links under that person's identity.

CVSS severity8.8
High
EPSS probability1.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Apollos Apps before 2.20.0 allows remote attackers to take over accounts using basic profile details. The People.create data source sent name, birthday, and gender in the initial Rock /People request, allowing Rock's auto-merge to bind a new registration to an existing person. Unauthenticated registration and knowledge of a person's basic profile are sufficient to access app functions and authenticated Rock-based links under that person's identity.

The record

CVE
CVE-2021-32691
Published
Jun 16, 2021
Updated
Aug 3, 2024
Vendor
The Apollos Project
Product
Apollos Apps
Classifications
CWE-303, CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apollos Project · Apollos Appsversion=< 2.20.0

Published CVSS scores

7.5NISTAV:N/AC:L/Au:N/C:P/I:P/A:P
8.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-303Incorrect Implementation of Authentication Algorithm
CWE-287Improper Authentication
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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