CVE-2023-1021Public exploitNetwork attack vector

Stored XSS via unescaped General Options settings

Published May 2, 2023 · Updated Jan 30, 2025

Stored XSS in Anmari AMR iCal Events Lists 6.6 and earlier allows remote authenticated users to execute script in an administrator's browser. The General Options form stores and renders crafted setting values without sanitization or output escaping. Administrator-level access is required even when unfiltered_html is disabled, and browser interaction with the affected settings page triggers the payload.

CVSS severity4.8
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Anmari AMR iCal Events Lists 6.6 and earlier allows remote authenticated users to execute script in an administrator's browser. The General Options form stores and renders crafted setting values without sanitization or output escaping. Administrator-level access is required even when unfiltered_html is disabled, and browser interaction with the affected settings page triggers the payload.

The record

CVE
CVE-2023-1021
Published
May 2, 2023
Updated
Jan 30, 2025
Vendor
Anmari
Product
AMR iCal Events Lists
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2025Record 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=0 <=6.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Anmari · AMR iCal Events Listsversion=0 <=6.6

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8CISA-ADPCVSS: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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