CVE-2021-24976Public exploitNetwork attack vector

Reflected script execution via unescaped search attribute

Published Jan 24, 2022 · Updated Aug 3, 2024

Reflected XSS in Wbolt Smart SEO Tool before 3.0.6 allows remote attackers to execute script through a crafted search request. When TDK optimization is enabled, the search parameter is inserted into an HTML attribute without sanitization or output escaping. Execution requires a user to follow the crafted URL; the script runs in that user's browser and can read or alter data available to the affected site origin.

CVSS severity6.1
Medium
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Wbolt Smart SEO Tool before 3.0.6 allows remote attackers to execute script through a crafted search request. When TDK optimization is enabled, the search parameter is inserted into an HTML attribute without sanitization or output escaping. Execution requires a user to follow the crafted URL; the script runs in that user's browser and can read or alter data available to the affected site origin.

The record

CVE
CVE-2021-24976
Published
Jan 24, 2022
Updated
Aug 3, 2024
Vendor
Wbolt
Product
Smart SEO Tool
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 24, 2022CVE 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=3.0.6 <3.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wbolt · Smart SEO Toolversion=3.0.6 <3.0.6

Published CVSS scores

2.6NIST NVDAV:N/AC:H/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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 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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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