CVE-2011-3760: Nucleus 3.61 allows remote attackers to obtain sensitive information via a direct request to a .php file, whic

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MEDIUM 5.0DOWNGRADE

CVE-2011-3760 is a medium-severity flaw (CVSS 5.0) affecting nucleus cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Nucleus 3.61 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error message, as demonstrated by xmlrpc/api_nucleus.inc.php and certain other files.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.4% (top 29%)
CISA exploited list	No
Weakness	CWE-200
Published	2011-09-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: nucleuscms

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2011-09-24 00:55 UTCPublished CVE record published
2026-06-16 23:33 UTCUpdated Record last modified

nucleuscms nucleus cms DOWNGRADE

Affected: 3.61

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.61

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 3.61 (Debian / Ubuntu)

apt-cache madison nucleus-cms sudo apt install nucleus-cms=<VERSION_BEFORE_3.61> 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_3.61> 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-2011-3760?

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

Is CVE-2011-3760 being exploited?

CVE-2011-3760 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-2011-3760 affect?

CVE-2011-3760 affects nucleus cms. Severity is medium (CVSS 5.0). Nucleus 3.61 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error message, as demonstrated by xmlrpc/api_nucleus.inc.php and certain other files.

How urgent is CVE-2011-3760?

Priority 40/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-37770 HIGH 7.2 DOWNGRADE Nucleus CMS v3.71 is affected by a file upload vulnerability
CVE-2018-16636 MEDIUM 6.5 DOWNGRADE Nucleus CMS 3.70 allows HTML Injection via the index.php body parameter.
CVE-2015-5454 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in Nucleus CMS allows remote attackers to inject arbitrary web script
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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