CVE-2021-26224: Cross-site scripting (XSS) vulnerability in SourceCodester Fantastic-Blog-CMS V 1.0 allows remote attackers to

This month

MEDIUM 6.1DOWNGRADE

CVE-2021-26224 is a medium-severity flaw (CVSS 6.1) affecting fantastic blog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in SourceCodester Fantastic-Blog-CMS V 1.0 allows remote attackers to inject arbitrary web script or HTML via the search field to search.php.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 42%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-07-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fantastic blog project

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

Am I affected?

Timeline

2021-07-22 19:15 UTCPublished CVE record published
2026-06-17 03:42 UTCUpdated Record last modified

fantastic blog project fantastic blog DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison fantastic-blog sudo apt install fantastic-blog=<VERSION_BEFORE_1.0> sudo apt-mark hold fantastic-blog

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

dnf --showduplicates list fantastic-blog sudo dnf downgrade fantastic-blog-<VERSION_BEFORE_1.0> sudo dnf versionlock add fantastic-blog

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-2021-26224?

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

Is CVE-2021-26224 being exploited?

CVE-2021-26224 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-2021-26224 affect?

CVE-2021-26224 affects fantastic blog. Severity is medium (CVSS 6.1). Cross-site scripting (XSS) vulnerability in SourceCodester Fantastic-Blog-CMS V 1.0 allows remote attackers to inject arbitrary web script or HTML via the search field to search.php.

How urgent is CVE-2021-26224?

Priority 41/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2022-28512 CRITICAL 9.8 DOWNGRADE A SQL injection vulnerability exists in Sourcecodester Fantastic Blog CMS 1.0

References

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