CVE-2007-1851: Multiple directory traversal vulnerabilities in Really Simple PHP and Ajax (RSPA) 2007-03-23 allow remote atta

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HIGH 7.5DOWNGRADE

CVE-2007-1851 is a high-severity flaw (CVSS 7.5) affecting really simple php and ajax. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple directory traversal vulnerabilities in Really Simple PHP and Ajax (RSPA) 2007-03-23 allow remote attackers to include and execute arbitrary local files via a .. (dot dot) in the __class parameter to (1) Controller_v4.php or (2) Controller_v5.php.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	6.7% (top 6%)
CISA exploited list	No
Published	2007-04-03
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: really simple php and ajax

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

Am I affected?

Timeline

2007-04-03 16:19 UTCPublished CVE record published
2026-06-16 22:38 UTCUpdated Record last modified

really simple php and ajax really simple php and ajax DOWNGRADE

Affected: 2007-03-23

Fixed in: no fixed release known

Safe to downgrade to: a release before 2007-03-23

1. Check installed version

apt-cache policy really-simple-php-and-ajax || rpm -q really-simple-php-and-ajax || really-simple-php-and-ajax --version

2. No fixed release: DOWNGRADE to a release before 2007-03-23 (Debian / Ubuntu)

apt-cache madison really-simple-php-and-ajax sudo apt install really-simple-php-and-ajax=<VERSION_BEFORE_2007-03-23> sudo apt-mark hold really-simple-php-and-ajax

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

dnf --showduplicates list really-simple-php-and-ajax sudo dnf downgrade really-simple-php-and-ajax-<VERSION_BEFORE_2007-03-23> sudo dnf versionlock add really-simple-php-and-ajax

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: Really Simple PHP and Ajax (RSPA) 2007-03-23 - Remote File Inclusion

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-2007-1851?

really simple php and ajax: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-1851 being exploited?

CVE-2007-1851 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-2007-1851 affect?

CVE-2007-1851 affects really simple php and ajax. Severity is high (CVSS 7.5). Multiple directory traversal vulnerabilities in Really Simple PHP and Ajax (RSPA) 2007-03-23 allow remote attackers to include and execute arbitrary local files via a .. (dot dot) in the __class parameter to (1) Controller_v4.php or (2) Con

How urgent is CVE-2007-1851?

Priority 55/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2007-1982 HIGH 7.5 UPGRADE Multiple PHP remote file inclusion vulnerabilities in Really Simple PHP and Ajax (RSPA) 2007-03-23 and earlier

References

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