CVE-2021-24272Public exploitNetwork attack vector

Stored XSS via forged calculator-header update

Published May 5, 2021 · Updated Aug 3, 2024

Cross-site request forgery in Gurcharan Singh Fitness Calculators before 1.9.6 allows remote attackers to store script in calculator headers. The water-calculator settings endpoint accepts a forged POST and stores the unsanitized fcw[fcw_heading] value. An attacker must induce a logged-in WordPress administrator to submit the request; the stored script then executes when affected content is viewed.

CVSS severity4.3
Medium
EPSS probability1.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Gurcharan Singh Fitness Calculators before 1.9.6 allows remote attackers to store script in calculator headers. The water-calculator settings endpoint accepts a forged POST and stores the unsanitized fcw[fcw_heading] value. An attacker must induce a logged-in WordPress administrator to submit the request; the stored script then executes when affected content is viewed.

The record

CVE
CVE-2021-24272
Published
May 5, 2021
Updated
Aug 3, 2024
Vendor
Gurcharan Singh
Product
Fitness Calculators
Classifications
CWE-352, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 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=1.9.6 <1.9.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gurcharan Singh · Fitness Calculatorsversion=1.9.6 <1.9.6

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1189Drive-by Compromise

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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