CVE-2020-10948: Jon Hedley AlienForm2 (typically installed as af.cgi or alienform.cgi) 2.0.2 is vulnerable to Remote Command E

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-10948 is a critical-severity flaw (CVSS 9.8) affecting alienform2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jon Hedley AlienForm2 (typically installed as af.cgi or alienform.cgi) 2.0.2 is vulnerable to Remote Command Execution via eval injection, a different issue than CVE-2002-0934. An unauthenticated, remote attacker can exploit this via a series of crafted requests.

Why this priority

Critical severity
EPSS top 6%: very likely to be exploited
Public exploit reference
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	6.7% (top 6%)
CISA exploited list	No
Weakness	CWE-94
Published	2020-04-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: alienform2 project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-04-01 21:15 UTCPublished CVE record published
2026-06-17 02:48 UTCUpdated Record last modified

alienform2 project alienform2 DOWNGRADE

Affected: 2.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.2

1. Check installed version

apt-cache policy alienform2 || rpm -q alienform2 || alienform2 --version

2. No fixed release: DOWNGRADE to a release before 2.0.2 (Debian / Ubuntu)

apt-cache madison alienform2 sudo apt install alienform2=<VERSION_BEFORE_2.0.2> sudo apt-mark hold alienform2

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

dnf --showduplicates list alienform2 sudo dnf downgrade alienform2-<VERSION_BEFORE_2.0.2> sudo dnf versionlock add alienform2

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-2020-10948?

alienform2: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-10948 being exploited?

CVE-2020-10948 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-2020-10948 affect?

CVE-2020-10948 affects alienform2. Severity is critical (CVSS 9.8). Jon Hedley AlienForm2 (typically installed as af.cgi or alienform.cgi) 2.0.2 is vulnerable to Remote Command Execution via eval injection, a different issue than CVE-2002-0934. An unauthenticated, remote attacker can exploit this via a seri

How urgent is CVE-2020-10948?

Priority 68/100. Critical severity; EPSS top 6%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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