CVE-2009-4978: Directory traversal vulnerability in down.php in MyBackup 1.4.0 allows remote attackers to read arbitrary file

This month

MEDIUM 5.0DOWNGRADE

CVE-2009-4978 is a medium-severity flaw (CVSS 5.0) affecting mybackup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in down.php in MyBackup 1.4.0 allows remote attackers to read arbitrary files via a .. (dot dot) in the filename parameter.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Weakness	CWE-22
Published	2010-08-25
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: tufat

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

Am I affected?

Timeline

2010-08-25 20:00 UTCPublished CVE record published
2026-06-16 23:14 UTCUpdated Record last modified

tufat mybackup DOWNGRADE

Affected: 1.4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.4.0 (Debian / Ubuntu)

apt-cache madison mybackup sudo apt install mybackup=<VERSION_BEFORE_1.4.0> sudo apt-mark hold mybackup

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

dnf --showduplicates list mybackup sudo dnf downgrade mybackup-<VERSION_BEFORE_1.4.0> sudo dnf versionlock add mybackup

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: mybackup 1.4.0 - File Download / 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-2009-4978?

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

Is CVE-2009-4978 being exploited?

CVE-2009-4978 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-2009-4978 affect?

CVE-2009-4978 affects mybackup. Severity is medium (CVSS 5.0). Directory traversal vulnerability in down.php in MyBackup 1.4.0 allows remote attackers to read arbitrary files via a .. (dot dot) in the filename parameter.

How urgent is CVE-2009-4978?

Priority 44/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2009-4977 MEDIUM 6.5 DOWNGRADE PHP remote file inclusion vulnerability in index.php in MyBackup 1.4.0 allows remote authenticated users to ex

References

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