CVE-2021-37460Public exploitNetwork attack vector

Authenticated reflected XSS via planprop id

Published Jul 25, 2021 · Updated Aug 4, 2024

Cross-site scripting in NCH Axon PBX 2.22 and earlier allows remote authenticated users to execute script in a victim's browser via /planprop?id=. The endpoint reflects the id query value into generated HTML without adequate output neutralization, enabling injected markup or script to run when a victim follows a crafted link. Exploitation requires a valid PBX session and victim interaction; the demonstrated impact is browser-context data access or actions, not direct server compromise.

CVSS severity5.4
Medium
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in NCH Axon PBX 2.22 and earlier allows remote authenticated users to execute script in a victim's browser via /planprop?id=. The endpoint reflects the id query value into generated HTML without adequate output neutralization, enabling injected markup or script to run when a victim follows a crafted link. Exploitation requires a valid PBX session and victim interaction; the demonstrated impact is browser-context data access or actions, not direct server compromise.

The record

CVE
CVE-2021-37460
Published
Jul 25, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1566.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1566.002Spearphishing Link

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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