CVE-2023-4250Public exploitNetwork attack vector

Reflected XSS via unescaped filter parameters

Published Oct 31, 2023 · Updated Apr 3, 2025

Reflected XSS in EventPrime before 3.2.0 allows remote attackers to execute script in a user's browser through crafted request parameters. The keyword and ep_filter_date parameters are returned to EventPrime pages without sufficient sanitization or output escaping. The request needs no authentication, but script execution requires a user, including a high-privilege administrator, to open the crafted link; the script can read or alter data available to that browser session.

CVSS severity6.1
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Reflected XSS in EventPrime before 3.2.0 allows remote attackers to execute script in a user's browser through crafted request parameters. The keyword and ep_filter_date parameters are returned to EventPrime pages without sufficient sanitization or output escaping. The request needs no authentication, but script execution requires a user, including a high-privilege administrator, to open the crafted link; the script can read or alter data available to that browser session.

The record

CVE
CVE-2023-4250
Published
Oct 31, 2023
Updated
Apr 3, 2025
Vendor
EventPrime Events
Product
EventPrime
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2025Record 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=0 <3.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

EventPrime Events · EventPrimeversion=0 <3.2.0

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1CISA-ADPCVSS: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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo