CVE-2015-5454: Cross-site scripting (XSS) vulnerability in Nucleus CMS allows remote attackers to inject arbitrary web script

Routine

MEDIUM 4.3DOWNGRADE

CVE-2015-5454 is a medium-severity flaw (CVSS 4.3) affecting nucleus cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in Nucleus CMS allows remote attackers to inject arbitrary web script or HTML via the title parameter when adding a new item.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-79
Published	2015-07-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: nucleuscms

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

Am I affected?

Timeline

2015-07-08 15:59 UTCPublished CVE record published
2026-06-17 00:29 UTCUpdated Record last modified

nucleuscms nucleus cms DOWNGRADE

Affected: 3.65 · 3.70

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.65

1. Check installed version

apt-cache policy nucleus-cms || rpm -q nucleus-cms || nucleus-cms --version

2. No fixed release: DOWNGRADE to a release before 3.65 (Debian / Ubuntu)

apt-cache madison nucleus-cms sudo apt install nucleus-cms=<VERSION_BEFORE_3.65> sudo apt-mark hold nucleus-cms

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

dnf --showduplicates list nucleus-cms sudo dnf downgrade nucleus-cms-<VERSION_BEFORE_3.65> sudo dnf versionlock add nucleus-cms

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-2015-5454?

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

Is CVE-2015-5454 being exploited?

CVE-2015-5454 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-2015-5454 affect?

CVE-2015-5454 affects nucleus cms. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in Nucleus CMS allows remote attackers to inject arbitrary web script or HTML via the title parameter when adding a new item.

How urgent is CVE-2015-5454?

Priority 39/100. Public exploit reference

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CVE-2011-3760 MEDIUM 5.0 DOWNGRADE Nucleus 3.61 allows remote attackers to obtain sensitive information via a direct request to a .php file, whic
CVE-2009-0929 MEDIUM 5.0 UPGRADE Directory traversal vulnerability in the media manager in Nucleus CMS before 3.40 allows remote attackers to r
CVE-2008-0497 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in action.php in Nucleus CMS 3.31 allows remote attackers to inject a

References

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