CVE-2018-14877: An issue was discovered in WeaselCMS v0.3.5

Routine

MEDIUM 5.4DOWNGRADE

CVE-2018-14877 is a medium-severity flaw (CVSS 5.4) affecting weaselcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in WeaselCMS v0.3.5. XSS exists via Site Language, Site Title, Site Description, and Site Keywords on the SETTINGS page.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-08-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: weaselcms project

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

Am I affected?

Timeline

2018-08-03 00:29 UTCPublished CVE record published
2026-06-17 01:41 UTCUpdated Record last modified

weaselcms project weaselcms DOWNGRADE

Affected: 0.3.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.3.5 (Debian / Ubuntu)

apt-cache madison weaselcms sudo apt install weaselcms=<VERSION_BEFORE_0.3.5> sudo apt-mark hold weaselcms

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

dnf --showduplicates list weaselcms sudo dnf downgrade weaselcms-<VERSION_BEFORE_0.3.5> sudo dnf versionlock add weaselcms

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-2018-14877?

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

Is CVE-2018-14877 being exploited?

CVE-2018-14877 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-2018-14877 affect?

CVE-2018-14877 affects weaselcms. Severity is medium (CVSS 5.4). An issue was discovered in WeaselCMS v0.3.5. XSS exists via Site Language, Site Title, Site Description, and Site Keywords on the SETTINGS page.

How urgent is CVE-2018-14877?

Priority 35/100. Public exploit reference

Related CVEs

CVE-2018-17361 MEDIUM 6.1 DOWNGRADE Multiple XSS vulnerabilities in WeaselCMS v0.3.6 allow remote attackers to inject arbitrary web script or HTML
CVE-2018-16352 CRITICAL 9.8 DOWNGRADE There is a PHP code upload vulnerability in WeaselCMS 0.3.6 via index.php because code can be embedded at the

References

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