CVE-2021-24298Public exploitNetwork attack vector

Reflected XSS via unescaped giveaway parameters

Published May 24, 2021 · Updated Aug 3, 2024

Reflected XSS in Simple Giveaways before 2.36.2 allows remote attackers to execute script in a visitor's browser via crafted links. Giveaway pages output the method and share GET parameters without sanitizing, validating, or escaping their values. Authentication is not required, but a visitor must open the crafted URL; the injected script then runs in the affected site's browser context.

CVSS severity6.1
Medium
EPSS probability3.45%
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 Simple Giveaways before 2.36.2 allows remote attackers to execute script in a visitor's browser via crafted links. Giveaway pages output the method and share GET parameters without sanitizing, validating, or escaping their values. Authentication is not required, but a visitor must open the crafted URL; the injected script then runs in the affected site's browser context.

The record

CVE
CVE-2021-24298
Published
May 24, 2021
Updated
Aug 3, 2024
Vendor
Simple Sponsorships
Product
Simple Giveaways
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 24, 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=2.36.2 <2.36.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Simple Sponsorships · Simple Giveawaysversion=2.36.2 <2.36.2

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NVDAV: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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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