CVE-2011-0643: Cross-site request forgery (CSRF) vulnerability in admin/conf_users_edit.php in PHP Link Directory (phpLD) 4.1

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MEDIUM 6.8DOWNGRADE

CVE-2011-0643 is a medium-severity flaw (CVSS 6.8) affecting php link directory. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site request forgery (CSRF) vulnerability in admin/conf_users_edit.php in PHP Link Directory (phpLD) 4.1.0 allows remote attackers to hijack the authentication of administrators for requests that add an administrator via the N action.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-352
Published	2011-01-25
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: phplinkdirectory

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

Am I affected?

Timeline

2011-01-25 19:00 UTCPublished CVE record published
2026-06-16 23:27 UTCUpdated Record last modified

phplinkdirectory php link directory DOWNGRADE

Affected: 4.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.1.0

1. Check installed version

apt-cache policy php-link-directory || rpm -q php-link-directory || php-link-directory --version

2. No fixed release: DOWNGRADE to a release before 4.1.0 (Debian / Ubuntu)

apt-cache madison php-link-directory sudo apt install php-link-directory=<VERSION_BEFORE_4.1.0> sudo apt-mark hold php-link-directory

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

dnf --showduplicates list php-link-directory sudo dnf downgrade php-link-directory-<VERSION_BEFORE_4.1.0> sudo dnf versionlock add php-link-directory

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: PHP Link Directory 4.1.0 - Cross-Site Request Forgery (Add Admin)

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-2011-0643?

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

Is CVE-2011-0643 being exploited?

CVE-2011-0643 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-2011-0643 affect?

CVE-2011-0643 affects php link directory. Severity is medium (CVSS 6.8). Cross-site request forgery (CSRF) vulnerability in admin/conf_users_edit.php in PHP Link Directory (phpLD) 4.1.0 allows remote attackers to hijack the authentication of administrators for requests that add an administrator via the N action.

How urgent is CVE-2011-0643?

Priority 44/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2008-6851 MEDIUM 5.1 DOWNGRADE SQL injection vulnerability in page.php in PHP Link Directory (phpLD) 3.3, when register_globals is enabled an

References

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