CVE-2004-1404: Attachment Mod 2.3.10 module for phpBB, when used with Apache mod_mime, does not properly handle files with mu

This month

HIGH 7.5WATCHLISTDOWNGRADE

CVE-2004-1404 is a high-severity flaw (CVSS 7.5) affecting attachment mod. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Attachment Mod 2.3.10 module for phpBB, when used with Apache mod_mime, does not properly handle files with multiple file extensions, such as .php.rar, which allows remote attackers to upload and execute arbitrary code.

Why this priority

High severity
On your watchlist

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: opentools

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

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:07 UTCUpdated Record last modified

opentools attachment mod DOWNGRADE

Affected: 2.3.4 · 2.3.5 · 2.3.6 · 2.3.7 · 2.3.8 · 2.3.9 · 2.3.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.4

1. Check installed version

apt-cache policy attachment-mod || rpm -q attachment-mod || attachment-mod --version

2. No fixed release: DOWNGRADE to a release before 2.3.4 (Debian / Ubuntu)

apt-cache madison attachment-mod sudo apt install attachment-mod=<VERSION_BEFORE_2.3.4> sudo apt-mark hold attachment-mod

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

dnf --showduplicates list attachment-mod sudo dnf downgrade attachment-mod-<VERSION_BEFORE_2.3.4> sudo dnf versionlock add attachment-mod

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-2004-1404?

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

Is CVE-2004-1404 being exploited?

CVE-2004-1404 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-2004-1404 affect?

CVE-2004-1404 affects attachment mod. Severity is high (CVSS 7.5). Attachment Mod 2.3.10 module for phpBB, when used with Apache mod_mime, does not properly handle files with multiple file extensions, such as .php.rar, which allows remote attackers to upload and execute arbitrary code.

How urgent is CVE-2004-1404?

Priority 53/100. High severity; On your watchlist

Software pages

PHP vulnerabilities

Related CVEs

CVE-2006-7073 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in Opentools Attachment Mod before 2.4.5 allows remote attackers to i
CVE-2005-1630 HIGH 7.5 DOWNGRADE Unknown vulnerability in Attachment Mod before 2.3.13, related to a "serious issue with realnames," has unknow
CVE-2004-1399 MEDIUM 5.0 DOWNGRADE Directory traversal vulnerability in the Attachment module 2.3.10 and earlier for phpBB allows remote attacker

References

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