CVE-2009-1587: index.php in PHP Site Lock 2.0 allows remote attackers to bypass authentication and obtain administrative acce

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HIGH 7.5DOWNGRADE

CVE-2009-1587 is a high-severity flaw (CVSS 7.5) affecting php site lock. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

index.php in PHP Site Lock 2.0 allows remote attackers to bypass authentication and obtain administrative access by setting the login_id, group_id, login_name, user_id, and user_type cookies to certain values.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-287
Published	2009-05-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: kalptarudemos

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

Am I affected?

Timeline

2009-05-07 23:30 UTCPublished CVE record published
2026-06-16 23:07 UTCUpdated Record last modified

kalptarudemos php site lock DOWNGRADE

Affected: 2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy php-site-lock || rpm -q php-site-lock || php-site-lock --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison php-site-lock sudo apt install php-site-lock=<VERSION_BEFORE_2.0> sudo apt-mark hold php-site-lock

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

dnf --showduplicates list php-site-lock sudo dnf downgrade php-site-lock-<VERSION_BEFORE_2.0> sudo dnf versionlock add php-site-lock

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 Site Lock 2.0 - Insecure Cookie Handling

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-2009-1587?

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

Is CVE-2009-1587 being exploited?

CVE-2009-1587 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-2009-1587 affect?

CVE-2009-1587 affects php site lock. Severity is high (CVSS 7.5). index.php in PHP Site Lock 2.0 allows remote attackers to bypass authentication and obtain administrative access by setting the login_id, group_id, login_name, user_id, and user_type cookies to certain values.

How urgent is CVE-2009-1587?

Priority 53/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2008-2865 HIGH 7.5 DOWNGRADE SQL injection vulnerability in index.php in Kalptaru Infotech PHP Site Lock 2.0 allows remote attackers to exe

References

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