CVE-2021-24878Known exploitationPublic exploitNetwork attack vector

Reflected XSS via unsanitized query string

Published Feb 7, 2022 · Updated Aug 3, 2024

Reflected XSS in PSM Web Solutions SupportCandy before 2.2.7 allows remote attackers to execute script via a crafted query string. Pages embedding the [wpsc_create_ticket] shortcode output the request query string without sanitizing or escaping it. A victim must follow the crafted URL and load such a page, allowing script execution in that visitor's browser context.

CVSS severity6.1
Medium
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in PSM Web Solutions SupportCandy before 2.2.7 allows remote attackers to execute script via a crafted query string. Pages embedding the [wpsc_create_ticket] shortcode output the request query string without sanitizing or escaping it. A victim must follow the crafted URL and load such a page, allowing script execution in that visitor's browser context.

The record

CVE
CVE-2021-24878
Published
Feb 7, 2022
Updated
Aug 3, 2024
Vendor
PSM Web Solutions PVT LTD
Product
SupportCandy
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.2.7 <2.2.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PSM Web Solutions PVT LTD · SupportCandyversion=2.2.7 <2.2.7

Published CVSS scores

4.3NIST NVDAV:N/AC:M/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
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.

Reported exploitation

Technologies

Your stack

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Your stack

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