CVE-2023-22856Network attack vector

Stored script execution via crafted file upload

Published Mar 6, 2023 · Updated Mar 5, 2025

Stored XSS in BlogEngine.NET 3.3.8.0 allows remote authenticated users to execute JavaScript in a blog visitor's browser via a crafted upload. The upload path stores attacker-controlled file content that a later visitor's browser interprets as executable script; the advisory does not identify the handler or missing validation. Exploitation requires upload privileges and a visitor to access the crafted file, allowing script execution within that visitor's blog origin.

CVSS severity8.5
High
EPSS probability0.38%
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 BlogEngine.NET 3.3.8.0 allows remote authenticated users to execute JavaScript in a blog visitor's browser via a crafted upload. The upload path stores attacker-controlled file content that a later visitor's browser interprets as executable script; the advisory does not identify the handler or missing validation. Exploitation requires upload privileges and a visitor to access the crafted file, allowing script execution within that visitor's blog origin.

The record

CVE
CVE-2023-22856
Published
Mar 6, 2023
Updated
Mar 5, 2025
Vendor
BlogEngine
Product
BlogEngine.NET
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2025Record 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=3.3.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

BlogEngine · BlogEngine.NETversion=3.3.8.0

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
8.5The Missing Link AustraliaCVSS:3.1/AV:N/AC:H/PR:L/UI:N/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')

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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