CVE-2022-33961Network attack vector

Administrator-level stored XSS via undisclosed editor input

Published May 10, 2023 · Updated Apr 28, 2026

Stored XSS in YellowPencil Visual CSS Style Editor 7.5.8 and earlier allows remote authenticated users to execute script in a viewer's browser. Patchstack has not published the affected parameter, function, or missing sanitization and output-encoding operation. Administrator access is required to plant the payload, and another user must open the affected output; consequences are limited to data access and modification in that user's browser context.

CVSS severity4.0
Medium
EPSS probability0.35%
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 YellowPencil Visual CSS Style Editor 7.5.8 and earlier allows remote authenticated users to execute script in a viewer's browser. Patchstack has not published the affected parameter, function, or missing sanitization and output-encoding operation. Administrator access is required to plant the payload, and another user must open the affected output; consequences are limited to data access and modification in that user's browser context.

The record

CVE
CVE-2022-33961
Published
May 10, 2023
Updated
Apr 28, 2026
Vendor
YellowPencil
Product
YellowPencil Visual CSS Style Editor
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=7.5.8 changes=[{"at":"7.5.9","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

YellowPencil · YellowPencil Visual CSS Style Editorversion=n/a <=7.5.8 changes=[{"at":"7.5.9","status":"unaffected"}]

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.0PatchstackCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8NIST NVDCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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