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PyroCMS vulnerable to stored Cross Site Scripting

Critical severity GitHub Reviewed Published Nov 25, 2022 to the GitHub Advisory Database • Updated Sep 20, 2023

Package

composer pyrocms/pyrocms (Composer)

Affected versions

<= 3.9.1

Patched versions

None

Description

PyroCMS 3.9 is vulnerable to a stored Cross Site Scripting (XSS) when a low privileged user, such as an author, injects a crafted html and javascript payload in a blog post, leading to full admin account takeover or privilege escalation.

References

Published by the National Vulnerability Database Nov 25, 2022
Published to the GitHub Advisory Database Nov 25, 2022
Reviewed Dec 5, 2022
Last updated Sep 20, 2023

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

EPSS score

0.104%
(43rd percentile)

Weaknesses

CVE ID

CVE-2022-37721

GHSA ID

GHSA-cm7f-hf2g-ghrp

Source code

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