CVE-2021-24588Public exploitNetwork attack vector

Authenticated script execution via unescaped username setting

Published Sep 6, 2021 · Updated Aug 3, 2024

Cross-site scripting in the SMS Alert plugin before 3.4.7 allows remote authenticated users to execute script through its settings page. The SMS Alert Username field accepts an attribute-breaking value and returns it to the settings form without proper output encoding, allowing focus attributes to execute JavaScript. Access to the plugin settings is required, and execution is confined to the browser session that renders or focuses the poisoned field.

CVSS severity6.1
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in the SMS Alert plugin before 3.4.7 allows remote authenticated users to execute script through its settings page. The SMS Alert Username field accepts an attribute-breaking value and returns it to the settings form without proper output encoding, allowing focus attributes to execute JavaScript. Access to the plugin settings is required, and execution is confined to the browser session that renders or focuses the poisoned field.

The record

CVE
CVE-2021-24588
Published
Sep 6, 2021
Updated
Aug 3, 2024
Vendor
Cozy Vision Technologies Pvt. Ltd.
Product
SMS Alert – SMS & OTP for WooCommerce, Order Notifications & Abandoned Cart Recovery
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 6, 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=3.4.7 <3.4.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cozy Vision Technologies Pvt. Ltd. · SMS Alert – SMS & OTP for WooCommerce, Order Notifications & Abandoned Cart Recoveryversion=3.4.7 <3.4.7

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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