CVE-2022-37721Network attack vector

Administrator account takeover via stored blog-post script

Published Nov 25, 2022 · Updated Jul 9, 2026

Stored cross-site scripting in PyroCMS before 3.9.1 allows remote authenticated users to take over an administrator account through a blog post. The blog post renderer stores author-supplied HTML and JavaScript without neutralizing executable markup, then serves it to a reader's browser. Author-level access is required, and exploitation depends on an administrator loading the affected post; successful script execution acts with that administrator's browser privileges.

CVSS severity9.0
Critical
EPSS probability0.73%
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 PyroCMS before 3.9.1 allows remote authenticated users to take over an administrator account through a blog post. The blog post renderer stores author-supplied HTML and JavaScript without neutralizing executable markup, then serves it to a reader's browser. Author-level access is required, and exploitation depends on an administrator loading the affected post; successful script execution acts with that administrator's browser privileges.

The record

CVE
CVE-2022-37721
Published
Nov 25, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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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

8.7INTEGRITY LabsCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
9.0GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
9.0CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
9.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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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