CVE-2013-4144: There is an object injection vulnerability in swfupload plugin for wordpress.

This month

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2013-4144 is a critical-severity flaw (CVSS 9.8) affecting swfupload. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

There is an object injection vulnerability in swfupload plugin for wordpress.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 36%)
CISA exploited list	No
Weakness	CWE-20, CWE-74
Published	2022-06-30
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: swfupload project

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

Am I affected?

Timeline

2022-06-30 18:15 UTCPublished CVE record published
2026-06-16 23:56 UTCUpdated Record last modified

swfupload project swfupload DOWNGRADE

Affected: 3.5.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.5.2 (Debian / Ubuntu)

apt-cache madison swfupload sudo apt install swfupload=<VERSION_BEFORE_3.5.2> sudo apt-mark hold swfupload

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

dnf --showduplicates list swfupload sudo dnf downgrade swfupload-<VERSION_BEFORE_3.5.2> sudo dnf versionlock add swfupload

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-2013-4144?

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

Is CVE-2013-4144 being exploited?

CVE-2013-4144 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-2013-4144 affect?

CVE-2013-4144 affects swfupload. Severity is critical (CVSS 9.8). There is an object injection vulnerability in swfupload plugin for wordpress.

How urgent is CVE-2013-4144?

Priority 55/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities

References

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