CVE-2023-22856: A stored Cross-site Scripting (XSS) vulnerability in BlogEngine.NET 3.3.8.0, allows injection of arbitrary Jav

Routine

HIGH 8.5DOWNGRADE

CVE-2023-22856 is a high-severity flaw (CVSS 8.5) affecting blogengine.net. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A stored Cross-site Scripting (XSS) vulnerability in BlogEngine.NET 3.3.8.0, allows injection of arbitrary JavaScript in the security context of a blog visitor through an upload of a specially crafted file.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-03-06
Last modified	2026-06-17

Publisher (CNA): The Missing Link Australia (TML) · Vendor: blogengine

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-03-06 07:15 UTCPublished CVE record published
2026-06-17 05:36 UTCUpdated Record last modified

blogengine blogengine.net DOWNGRADE

Affected: 3.3.8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3.8.0

1. Check installed version

apt-cache policy blogengine.net || rpm -q blogengine.net || blogengine.net --version

2. No fixed release: DOWNGRADE to a release before 3.3.8.0 (Debian / Ubuntu)

apt-cache madison blogengine.net sudo apt install blogengine.net=<VERSION_BEFORE_3.3.8.0> sudo apt-mark hold blogengine.net

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list blogengine.net sudo dnf downgrade blogengine.net-<VERSION_BEFORE_3.3.8.0> sudo dnf versionlock add blogengine.net

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-22856?

blogengine.net: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-22856 being exploited?

CVE-2023-22856 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-22856 affect?

CVE-2023-22856 affects blogengine.net. Severity is high (CVSS 8.5). A stored Cross-site Scripting (XSS) vulnerability in BlogEngine.NET 3.3.8.0, allows injection of arbitrary JavaScript in the security context of a blog visitor through an upload of a specially crafted file.

How urgent is CVE-2023-22856?

Priority 38/100. High severity

Related CVEs

CVE-2023-33405 MEDIUM 6.1 UPGRADE Blogengine.net 3.3.8.0 and earlier is vulnerable to Open Redirect.
CVE-2023-33404 CRITICAL 9.8 UPGRADE An Unrestricted Upload vulnerability, due to insufficient validation on UploadControlled.cs file, in BlogEngin
CVE-2023-22858 MEDIUM 5.3 DOWNGRADE An Improper Access Control vulnerability in BlogEngine.NET 3.3.8.0, allows unauthenticated visitors to access
CVE-2023-22857 HIGH 8.5 DOWNGRADE A stored Cross-site Scripting (XSS) vulnerability in BlogEngine.NET 3.3.8.0, allows injection of arbitrary Jav
CVE-2022-41418 HIGH 7.2 DOWNGRADE An issue in the component BlogEngine/BlogEngine.NET/AppCode/Api/UploadController.cs of BlogEngine.NET v3.3.8.0

References

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