CVE-2021-31651: Cross Site Scripting (XSS) vulnerability in neofarg-cms 0.2.3 allows remoate attacker to run arbitrary code vi

Routine

MEDIUM 4.8DOWNGRADE

CVE-2021-31651 is a medium-severity flaw (CVSS 4.8) affecting neofrag. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerability in neofarg-cms 0.2.3 allows remoate attacker to run arbitrary code via the copyright field in copyright settings.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-07-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: neofr

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

Am I affected?

Timeline

2023-07-31 14:15 UTCPublished CVE record published
2026-06-17 03:52 UTCUpdated Record last modified

neofr neofrag DOWNGRADE

Affected: 0.2.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.2.3 (Debian / Ubuntu)

apt-cache madison neofrag sudo apt install neofrag=<VERSION_BEFORE_0.2.3> sudo apt-mark hold neofrag

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

dnf --showduplicates list neofrag sudo dnf downgrade neofrag-<VERSION_BEFORE_0.2.3> sudo dnf versionlock add neofrag

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-2021-31651?

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

Is CVE-2021-31651 being exploited?

CVE-2021-31651 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-2021-31651 affect?

CVE-2021-31651 affects neofrag. Severity is medium (CVSS 4.8). Cross Site Scripting (XSS) vulnerability in neofarg-cms 0.2.3 allows remoate attacker to run arbitrary code via the copyright field in copyright settings.

How urgent is CVE-2021-31651?

Priority 24/100. No elevated risk signals yet.

References

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