CVE-2023-0643Public exploitNetwork attack vector

Authenticated XSS via unescaped Markdown rendering

Published Feb 2, 2023 · Updated Mar 26, 2025

Cross-site scripting in Squidex before 7.4.0 allows remote authenticated users to execute JavaScript through crafted Markdown input. MarkdownDirective and MarkdownPipe pass unescaped HTML through marked and assign the resulting markup to innerHTML. Exploitation requires permission to supply a rendered Markdown value and exposes or modifies data available to the affected browser session.

CVSS severity6.1
Medium
EPSS probability0.58%
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 Squidex before 7.4.0 allows remote authenticated users to execute JavaScript through crafted Markdown input. MarkdownDirective and MarkdownPipe pass unescaped HTML through marked and assign the resulting markup to innerHTML. Exploitation requires permission to supply a rendered Markdown value and exposes or modifies data available to the affected browser session.

The record

CVE
CVE-2023-0643
Published
Feb 2, 2023
Updated
Mar 26, 2025
Vendor
Squidex
Product
Squidex
Classifications
CWE-167, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2025Record 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?

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

  1. Affected versionversion=unspecified <7.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Squidex · Squidexversion=unspecified <7.4.0

Published CVSS scores

5.4huntr.devCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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 exploitPublished

Weakness, pattern, technique

CWE-167Improper Handling of Additional Special Element
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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