CVE-2022-23626: m1k1o/blog is a lightweight self-hosted facebook-styled PHP blog

Q: How do I fix CVE-2022-23626?

blog: upgrade to 1.4. Exact commands for each OS are on this page.

Q: Is CVE-2022-23626 being exploited?

CVE-2022-23626 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-23626 affect?

CVE-2022-23626 affects blog. Severity is high (CVSS 8.5). m1k1o/blog is a lightweight self-hosted facebook-styled PHP blog. Errors from functions `imagecreatefrom*` and `image*` have not been checked properly. Although PHP issued warnings and the upload function returned `false`, the original file

Q: How urgent is CVE-2022-23626?

Priority 59/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference

This week

HIGH 8.5UPGRADE

CVE-2022-23626 is a high-severity flaw (CVSS 8.5) affecting blog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

m1k1o/blog is a lightweight self-hosted facebook-styled PHP blog. Errors from functions `imagecreatefrom*` and `image*` have not been checked properly. Although PHP issued warnings and the upload function returned `false`, the original file (that could contain a malicious payload) was kept on the disk. Users are advised to upgrade as soon as possible. There are no known workarounds for this issue.

Why this priority

High severity
EPSS top 4%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	9.9% (top 4%)
CISA exploited list	No
Weakness	CWE-20, CWE-252
Published	2022-02-08
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: blog project

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

Am I affected?

Timeline

2022-02-08 22:15 UTCPublished CVE record published
2026-06-17 04:30 UTCUpdated Record last modified

blog project blog UPGRADE

Affected: < 1.4

Fixed in: 1.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy blog || rpm -q blog || blog --version

2. UPGRADE to 1.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade blog

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade blog

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: m1k1o's Blog v.10 - Remote Code Execution (RCE) (Authenticated)

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-2022-23626?

blog: upgrade to 1.4. Exact commands for each OS are on this page.

Is CVE-2022-23626 being exploited?

CVE-2022-23626 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-2022-23626 affect?

CVE-2022-23626 affects blog. Severity is high (CVSS 8.5). m1k1o/blog is a lightweight self-hosted facebook-styled PHP blog. Errors from functions `imagecreatefrom*` and `image*` have not been checked properly. Although PHP issued warnings and the upload function returned `false`, the original file

How urgent is CVE-2022-23626?

Priority 59/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

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References

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