CVE-2009-1482: Multiple cross-site scripting (XSS) vulnerabilities in action/AttachFile.py in MoinMoin 1.8.2 and earlier allo

Q: How do I fix CVE-2009-1482?

moinmoin: downgrade or apply the listed mitigation; moinmoin: upgrade to newer than 1.8.2. Exact commands for each OS are on this page.

Q: Is CVE-2009-1482 being exploited?

CVE-2009-1482 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2009-1482 affect?

CVE-2009-1482 affects moinmoin, moinmoin. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in action/AttachFile.py in MoinMoin 1.8.2 and earlier allow remote attackers to inject arbitrary web script or HTML via (1) an AttachFile sub-action in the error_msg function or (2) multip

Q: How urgent is CVE-2009-1482?

Priority 41/100. Public exploit reference

This month

MEDIUM 4.3DOWNGRADEUPGRADE

CVE-2009-1482 is a medium-severity flaw (CVSS 4.3) affecting moinmoin, moinmoin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in action/AttachFile.py in MoinMoin 1.8.2 and earlier allow remote attackers to inject arbitrary web script or HTML via (1) an AttachFile sub-action in the error_msg function or (2) multiple vectors related to package file errors in the upload_form function, different vectors than CVE-2009-0260.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-79
Published	2009-04-29
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: moinmo · moinmoin

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

Am I affected?

Timeline

2009-04-29 18:30 UTCPublished CVE record published
2026-06-16 23:07 UTCUpdated Record last modified

moinmo moinmoin DOWNGRADE

Affected: 1.6.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.6.1 (Debian / Ubuntu)

apt-cache madison moinmoin sudo apt install moinmoin=<VERSION_BEFORE_1.6.1> sudo apt-mark hold moinmoin

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

dnf --showduplicates list moinmoin sudo dnf downgrade moinmoin-<VERSION_BEFORE_1.6.1> sudo dnf versionlock add moinmoin

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.

moinmoin moinmoin UPGRADE

Affected: <= 1.8.2 · 0.1 · 0.2 · 0.3 · 0.7 · 0.8 · 0.9 · 0.10

Fixed in: newer than 1.8.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.8.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade moinmoin

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade moinmoin

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2009-1482?

moinmoin: downgrade or apply the listed mitigation; moinmoin: upgrade to newer than 1.8.2. Exact commands for each OS are on this page.

Is CVE-2009-1482 being exploited?

CVE-2009-1482 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-2009-1482 affect?

CVE-2009-1482 affects moinmoin, moinmoin. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in action/AttachFile.py in MoinMoin 1.8.2 and earlier allow remote attackers to inject arbitrary web script or HTML via (1) an AttachFile sub-action in the error_msg function or (2) multip

How urgent is CVE-2009-1482?

Priority 41/100. Public exploit reference

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References

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