CVE-2007-3118: Multiple PHP remote file inclusion vulnerabilities in Kravchuk letter (K-letter) 1.0 allow remote attackers to

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HIGH 7.5DOWNGRADE

CVE-2007-3118 is a high-severity flaw (CVSS 7.5) affecting k-letter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple PHP remote file inclusion vulnerabilities in Kravchuk letter (K-letter) 1.0 allow remote attackers to execute arbitrary PHP code via a URL in the scdir parameter to (1) action.php, (2) subs.php, or (3) unsubs.php.

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	3.4% (top 11%)
CISA exploited list	No
Published	2007-06-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: k-letter

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

Am I affected?

Timeline

2007-06-07 21:30 UTCPublished CVE record published
2026-06-16 22:41 UTCUpdated Record last modified

k-letter k-letter 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 k-letter || rpm -q k-letter || k-letter --version

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

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

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

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

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: Kravchuk letter script 1.0 - 'scdir' 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-2007-3118?

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

Is CVE-2007-3118 being exploited?

CVE-2007-3118 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-2007-3118 affect?

CVE-2007-3118 affects k-letter. Severity is high (CVSS 7.5). Multiple PHP remote file inclusion vulnerabilities in Kravchuk letter (K-letter) 1.0 allow remote attackers to execute arbitrary PHP code via a URL in the scdir parameter to (1) action.php, (2) subs.php, or (3) unsubs.php.

How urgent is CVE-2007-3118?

Priority 53/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

References

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