CVE-2007-1638: Multiple cross-site request forgery (CSRF) vulnerabilities in the check_csrftoken function in lib/lib.inc.php

This month

MEDIUM 6.8DOWNGRADE

CVE-2007-1638 is a medium-severity flaw (CVSS 6.8) affecting phpprojekt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site request forgery (CSRF) vulnerabilities in the check_csrftoken function in lib/lib.inc.php in PHProjekt 5.2.0, when magic_quotes_gpc is disabled, allow remote attackers to perform unauthorized actions as an arbitrary user via the (1) Projects, (2) Contacts, (3) Helpdesk, (4) Notes, (5) Search, (6) Mail, or (7) Filemanager module; the (9) summary page; or unspecified other files.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Published	2007-03-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: phpprojekt

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

Am I affected?

Timeline

2007-03-23 23:19 UTCPublished CVE record published
2026-06-16 22:38 UTCUpdated Record last modified

phpprojekt phpprojekt DOWNGRADE

Affected: 5.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.2.0 (Debian / Ubuntu)

apt-cache madison phpprojekt sudo apt install phpprojekt=<VERSION_BEFORE_5.2.0> sudo apt-mark hold phpprojekt

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

dnf --showduplicates list phpprojekt sudo dnf downgrade phpprojekt-<VERSION_BEFORE_5.2.0> sudo dnf versionlock add phpprojekt

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-2007-1638?

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

Is CVE-2007-1638 being exploited?

CVE-2007-1638 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-2007-1638 affect?

CVE-2007-1638 affects phpprojekt. Severity is medium (CVSS 6.8). Multiple cross-site request forgery (CSRF) vulnerabilities in the check_csrftoken function in lib/lib.inc.php in PHProjekt 5.2.0, when magic_quotes_gpc is disabled, allow remote attackers to perform unauthorized actions as an arbitrary user

How urgent is CVE-2007-1638?

Priority 43/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

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CVE-2002-0451 HIGH 7.5 DOWNGRADE filemanager_forms.php in PHProjekt 3.1 and 3.1a allows remote attackers to execute arbitrary PHP code by speci
CVE-2001-0995 HIGH 7.5 UPGRADE PHProjekt before 2.4a allows remote attackers to perform actions as other PHProjekt users by modifying the ID

References

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