CVE-2021-24623Public exploitNetwork attack vector

Stored XSS via unsanitized ticket taxonomy parameters

Published Sep 13, 2021 · Updated Aug 3, 2024

Stored cross-site scripting in firebird75 WP Advanced Ticket System before 1.0.64 allows remote authenticated users to execute script in ticket viewers. The ticket editor stores the wats_select_ticket_type, wats_select_ticket_priority, and wats_select_ticket_status parameters without sanitization and later emits them without escaping. Exploitation requires high-privilege access and a victim to open the affected ticket page, where the payload runs in the victim's browser context.

CVSS severity4.8
Medium
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in firebird75 WP Advanced Ticket System before 1.0.64 allows remote authenticated users to execute script in ticket viewers. The ticket editor stores the wats_select_ticket_type, wats_select_ticket_priority, and wats_select_ticket_status parameters without sanitization and later emits them without escaping. Exploitation requires high-privilege access and a victim to open the affected ticket page, where the payload runs in the victim's browser context.

The record

CVE
CVE-2021-24623
Published
Sep 13, 2021
Updated
Aug 3, 2024
Vendor
firebird75
Product
WP Advanced Ticket System, Elite Support Helpdesk
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 13, 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

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=1.0.64 <1.0.64

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

firebird75 · WP Advanced Ticket System, Elite Support Helpdeskversion=1.0.64 <1.0.64

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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