CVE-2005-3770: Multiple cross-site scripting (XSS) vulnerabilities in PHP-Post (PHPp) 1.0 allow remote attackers to inject ar

This month

MEDIUM 4.3DOWNGRADE

CVE-2005-3770 is a medium-severity flaw (CVSS 4.3) affecting phppost. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in PHP-Post (PHPp) 1.0 allow remote attackers to inject arbitrary web script or HTML via (1) the subject in a post, or the user parameter to (2) profile.php and (3) mail.php.

Why this priority

EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Weakness	CWE-79
Published	2005-11-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: phppost

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

Am I affected?

Timeline

2005-11-23 00:03 UTCPublished CVE record published
2026-06-16 22:17 UTCUpdated Record last modified

phppost phppost DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy phppost || rpm -q phppost || phppost --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison phppost sudo apt install phppost=<VERSION_BEFORE_1.0> sudo apt-mark hold phppost

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

dnf --showduplicates list phppost sudo dnf downgrade phppost-<VERSION_BEFORE_1.0> sudo dnf versionlock add phppost

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: PHPPost 1.0 - 'mail.php?user' Cross-Site Scripting
Exploit-DB: PHPPost 1.0 - 'profile.php?user' Cross-Site Scripting

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-2005-3770?

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

Is CVE-2005-3770 being exploited?

CVE-2005-3770 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-2005-3770 affect?

CVE-2005-3770 affects phppost. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in PHP-Post (PHPp) 1.0 allow remote attackers to inject arbitrary web script or HTML via (1) the subject in a post, or the user parameter to (2) profile.php and (3) mail.php.

How urgent is CVE-2005-3770?

Priority 43/100. EPSS top 9%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

References

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