CVE-2021-24631Public exploitNetwork attack vector

Authenticated SQL injection via unsanitized deletion identifier

Published Nov 8, 2021 · Updated Aug 3, 2024

SQL injection in Unlimited PopUps 4.5.3 and earlier allows remote authenticated users to alter database queries through the did parameter. The popup deletion handler in popuplist.php concatenates the did GET value directly after the id predicate without sanitization, validation, escaping, or a prepared statement. An Editor account can reach the handler and use crafted SQL to read or modify the WordPress database or interrupt database service.

CVSS severity8.8
High
EPSS probability1.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Unlimited PopUps 4.5.3 and earlier allows remote authenticated users to alter database queries through the did parameter. The popup deletion handler in popuplist.php concatenates the did GET value directly after the id predicate without sanitization, validation, escaping, or a prepared statement. An Editor account can reach the handler and use crafted SQL to read or modify the WordPress database or interrupt database service.

The record

CVE
CVE-2021-24631
Published
Nov 8, 2021
Updated
Aug 3, 2024
Vendor
Samina Naz
Product
Unlimited PopUps
Classifications
CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 8, 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=4.5.3 <=4.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Samina Naz · Unlimited PopUpsversion=4.5.3 <=4.5.3

Published CVSS scores

7.2Wordfence IntelligenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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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

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
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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