CVE-2021-24821Public exploitNetwork attack vector

Contributor-level stored XSS via unneutralized fields

Published Mar 7, 2022 · Updated Aug 3, 2024

Stored XSS in BoldThemes Cost Calculator before 1.6 allows remote authenticated users to execute script through crafted form fields. The plugin stores Description values from Price Settings and Text Preview values from Projects without neutralizing executable markup, then renders them on edit pages and calculator shortcode pages. Contributor access is sufficient to plant a payload; execution occurs when the contributor reloads an affected editor, an administrator views it, or a visitor opens a page containing the shortcode.

CVSS severity5.4
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in BoldThemes Cost Calculator before 1.6 allows remote authenticated users to execute script through crafted form fields. The plugin stores Description values from Price Settings and Text Preview values from Projects without neutralizing executable markup, then renders them on edit pages and calculator shortcode pages. Contributor access is sufficient to plant a payload; execution occurs when the contributor reloads an affected editor, an administrator views it, or a visitor opens a page containing the shortcode.

The record

CVE
CVE-2021-24821
Published
Mar 7, 2022
Updated
Aug 3, 2024
Vendor
BoldThemes
Product
Cost Calculator
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 7, 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=1.6 <1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

BoldThemes · Cost Calculatorversion=1.6 <1.6

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 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')
T1059.007Command and Scripting Interpreter: JavaScript

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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