CVE-2018-16951: xunfeng 0.2.0 allows command execution via CSRF because masscan.py mishandles backquote characters, a related

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HIGH 8.0DOWNGRADE

CVE-2018-16951 is a high-severity flaw (CVSS 8.0) affecting xunfeng. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

xunfeng 0.2.0 allows command execution via CSRF because masscan.py mishandles backquote characters, a related issue to CVE-2018-16832.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-352
Published	2018-09-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: xunfeng project

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

Am I affected?

Timeline

2018-09-12 01:29 UTCPublished CVE record published
2026-06-17 01:45 UTCUpdated Record last modified

xunfeng project xunfeng DOWNGRADE

Affected: 0.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.2.0 (Debian / Ubuntu)

apt-cache madison xunfeng sudo apt install xunfeng=<VERSION_BEFORE_0.2.0> sudo apt-mark hold xunfeng

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

dnf --showduplicates list xunfeng sudo dnf downgrade xunfeng-<VERSION_BEFORE_0.2.0> sudo dnf versionlock add xunfeng

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-2018-16951?

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

Is CVE-2018-16951 being exploited?

CVE-2018-16951 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-2018-16951 affect?

CVE-2018-16951 affects xunfeng. Severity is high (CVSS 8.0). xunfeng 0.2.0 allows command execution via CSRF because masscan.py mishandles backquote characters, a related issue to CVE-2018-16832.

How urgent is CVE-2018-16951?

Priority 47/100. High severity; Public exploit reference

Related CVEs

CVE-2018-16832 MEDIUM 6.5 DOWNGRADE CSRF in the anti-csrf decorator in xunfeng 0.2.0 allows an attacker to modify the configuration via a Flash fi

References

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