CVE-2009-5025: A backdoor (aka BMSA-2009-07) was found in PyForum v1.0.3 where an attacker who knows a valid user email could

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HIGH 7.5REMOTEDOWNGRADE

CVE-2009-5025 is a high-severity flaw (CVSS 7.5) affecting pyforum. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A backdoor (aka BMSA-2009-07) was found in PyForum v1.0.3 where an attacker who knows a valid user email could force a password reset on behalf of that user.

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-640
Published	2020-01-15
Last modified	2026-06-16

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

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

Am I affected?

Timeline

2020-01-15 21:15 UTCPublished CVE record published
2026-06-16 23:14 UTCUpdated Record last modified

pyforum project pyforum DOWNGRADE

Affected: 1.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.3 (Debian / Ubuntu)

apt-cache madison pyforum sudo apt install pyforum=<VERSION_BEFORE_1.0.3> sudo apt-mark hold pyforum

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

dnf --showduplicates list pyforum sudo dnf downgrade pyforum-<VERSION_BEFORE_1.0.3> sudo dnf versionlock add pyforum

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-2009-5025?

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

Is CVE-2009-5025 being exploited?

CVE-2009-5025 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-2009-5025 affect?

CVE-2009-5025 affects pyforum. Severity is high (CVSS 7.5). A backdoor (aka BMSA-2009-07) was found in PyForum v1.0.3 where an attacker who knows a valid user email could force a password reset on behalf of that user.

How urgent is CVE-2009-5025?

Priority 51/100. High severity; Remotely exploitable, no login, no user action

References

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