CVE-2021-24498Public exploitNetwork attack vector

Reflected XSS via unescaped date parameters

Published Aug 2, 2021 · Updated Aug 3, 2024

Reflected XSS in CodePeople CP Multi View Events Calendar before 1.4.01 allows remote attackers to execute script via crafted date parameters. php/edit.php writes the start and end GET parameter values into the response without sanitizing or escaping them. Exploitation requires a user to open a crafted request, allowing script execution in that user's browser context.

CVSS severity6.1
Medium
EPSS probability3.54%
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 CodePeople CP Multi View Events Calendar before 1.4.01 allows remote attackers to execute script via crafted date parameters. php/edit.php writes the start and end GET parameter values into the response without sanitizing or escaping them. Exploitation requires a user to open a crafted request, allowing script execution in that user's browser context.

The record

CVE
CVE-2021-24498
Published
Aug 2, 2021
Updated
Aug 3, 2024
Vendor
CodePeople
Product
CP Multi View Events Calendar
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 2, 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=1.4.01 <1.4.01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CodePeople · CP Multi View Events Calendarversion=1.4.01 <1.4.01

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NVDCVSS: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 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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