CVE-2011-4449: actions/files/files.php in WikkaWiki 1.3.1 and 1.3.2, when INTRANET_MODE is enabled, supports file uploads for

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MEDIUM 6.8DOWNGRADE

CVE-2011-4449 is a medium-severity flaw (CVSS 6.8) affecting wikkawiki. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

actions/files/files.php in WikkaWiki 1.3.1 and 1.3.2, when INTRANET_MODE is enabled, supports file uploads for file extensions that are typically absent from an Apache HTTP Server TypesConfig file, which makes it easier for remote attackers to execute arbitrary PHP code by placing this code in a file whose name has multiple extensions, as demonstrated by a (1) .mm or (2) .vpp file.

Why this priority

EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Published	2012-09-05
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: wikkawiki

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

Am I affected?

Timeline

2012-09-05 20:55 UTCPublished CVE record published
2026-06-16 23:34 UTCUpdated Record last modified

wikkawiki wikkawiki DOWNGRADE

Affected: 1.3.1 · 1.3.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.3.1 (Debian / Ubuntu)

apt-cache madison wikkawiki sudo apt install wikkawiki=<VERSION_BEFORE_1.3.1> sudo apt-mark hold wikkawiki

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

dnf --showduplicates list wikkawiki sudo dnf downgrade wikkawiki-<VERSION_BEFORE_1.3.1> sudo dnf versionlock add wikkawiki

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: WikkaWiki 1.3.2 - Multiple Vulnerabilities
Exploit-DB: WikkaWiki 1.3.2 - Spam Logging PHP Injection (Metasploit)

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-2011-4449?

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

Is CVE-2011-4449 being exploited?

CVE-2011-4449 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-2011-4449 affect?

CVE-2011-4449 affects wikkawiki. Severity is medium (CVSS 6.8). actions/files/files.php in WikkaWiki 1.3.1 and 1.3.2, when INTRANET_MODE is enabled, supports file uploads for file extensions that are typically absent from an Apache HTTP Server TypesConfig file, which makes it easier for remote attackers

How urgent is CVE-2011-4449?

Priority 52/100. EPSS top 9%: very likely to be exploited; Public exploit reference

Software pages

Apache HTTP Server vulnerabilities · PHP vulnerabilities

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CVE-2011-4451 MEDIUM 4.3 DOWNGRADE libs/Wakka.class.php in WikkaWiki 1.3.1 and 1.3.2, when the spam_logging option is enabled, allows remote atta
CVE-2011-4450 MEDIUM 6.4 DOWNGRADE Directory traversal vulnerability in handlers/files.xml/files.xml.php in WikkaWiki 1.3.1 and 1.3.2 allows remo
CVE-2011-4448 HIGH 7.5 DOWNGRADE SQL injection vulnerability in actions/usersettings/usersettings.php in WikkaWiki 1.3.1 and 1.3.2 allows remot

References

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