CVE-2012-0812: PostfixAdmin 2.3.4 has multiple XSS vulnerabilities

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MEDIUM 6.1WATCHLISTDOWNGRADEMITIGATE

CVE-2012-0812 is a medium-severity flaw (CVSS 6.1) affecting postfix admin, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PostfixAdmin 2.3.4 has multiple XSS vulnerabilities

Why this priority

On your watchlist

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-11-22
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: debian · postfix admin project

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

Am I affected?

Timeline

2019-11-22 17:15 UTCPublished CVE record published
2026-06-16 23:38 UTCUpdated Record last modified

postfix admin project postfix admin DOWNGRADE

Affected: 2.3.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.4

1. Check installed version

apt-cache policy postfix-admin || rpm -q postfix-admin || postfix-admin --version

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

apt-cache madison postfix-admin sudo apt install postfix-admin=<VERSION_BEFORE_2.3.4> sudo apt-mark hold postfix-admin

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

dnf --showduplicates list postfix-admin sudo dnf downgrade postfix-admin-<VERSION_BEFORE_2.3.4> sudo dnf versionlock add postfix-admin

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.

debian debian linux MITIGATE

Affected: 8.0 · 9.0 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2012-0812?

postfix admin: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-0812 being exploited?

CVE-2012-0812 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-2012-0812 affect?

CVE-2012-0812 affects postfix admin, debian linux. Severity is medium (CVSS 6.1). PostfixAdmin 2.3.4 has multiple XSS vulnerabilities

How urgent is CVE-2012-0812?

Priority 43/100. On your watchlist

Software pages

Debian vulnerabilities · Postfix vulnerabilities

References

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