CVE-2021-24379Public exploitNetwork attack vector

Unlimited comment votes via replayed AJAX requests

Published Jun 21, 2021 · Updated Aug 3, 2024

Incorrect authorization in Happy Coders Comments Like Dislike before 1.1.4 allows remote attackers to add unlimited comment votes. The cld_comment_ajax_action AJAX handler accepts replayed like or dislike requests because restriction modes rely on client-side checks. No account or user interaction is required, and exploitation is limited to manipulating comment like or dislike counts.

CVSS severity5.3
Medium
EPSS probability0.98%
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 Happy Coders Comments Like Dislike before 1.1.4 allows remote attackers to add unlimited comment votes. The cld_comment_ajax_action AJAX handler accepts replayed like or dislike requests because restriction modes rely on client-side checks. No account or user interaction is required, and exploitation is limited to manipulating comment like or dislike counts.

The record

CVE
CVE-2021-24379
Published
Jun 21, 2021
Updated
Aug 3, 2024
Vendor
Happy Coders
Product
Comments Like Dislike
Classifications
CWE-863, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 21, 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=1.1.4 <1.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Happy Coders · Comments Like Dislikeversion=1.1.4 <1.1.4

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect 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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