CVE-2021-24997Public exploitNetwork attack vector

Chat disclosure and impersonation via unauthenticated REST endpoints

Published Dec 27, 2021 · Updated Aug 3, 2024

Missing authorization in WP Guppy before 1.3 allows remote attackers to read usernames and chats or send messages as arbitrary users. The load-guppy-users and load-guppy-user-chat REST routes return user or conversation data without authorization, while send-guppy-message trusts caller-supplied user and receiver identifiers. Network access to the WordPress REST API is sufficient; no account is required, and exposed sites permit chat disclosure and message impersonation.

CVSS severity6.5
Medium
EPSS probability2.75%
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 WP Guppy before 1.3 allows remote attackers to read usernames and chats or send messages as arbitrary users. The load-guppy-users and load-guppy-user-chat REST routes return user or conversation data without authorization, while send-guppy-message trusts caller-supplied user and receiver identifiers. Network access to the WordPress REST API is sufficient; no account is required, and exposed sites permit chat disclosure and message impersonation.

The record

CVE
CVE-2021-24997
Published
Dec 27, 2021
Updated
Aug 3, 2024
Vendor
AmentoTech Private Limited
Product
WP Guppy
Classifications
CWE-862, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 27, 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=1.3 <1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AmentoTech Private Limited · WP Guppyversion=1.3 <1.3

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
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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