CVE-2020-28468: This affects the package pwntools before 4.3.1

Q: How do I fix CVE-2020-28468?

pwntools: upgrade to 4.3.1. Exact commands for each OS are on this page.

Q: Is CVE-2020-28468 being exploited?

CVE-2020-28468 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-2020-28468 affect?

CVE-2020-28468 affects pwntools. Severity is high (CVSS 8.1). This affects the package pwntools before 4.3.1. The shellcraft generator for affected versions of this module are vulnerable to Server-Side Template Injection (SSTI), which can lead to remote code execution.

Q: How urgent is CVE-2020-28468?

Priority 61/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.1REMOTEUPGRADE

CVE-2020-28468 is a high-severity flaw (CVSS 8.1) affecting pwntools. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This affects the package pwntools before 4.3.1. The shellcraft generator for affected versions of this module are vulnerable to Server-Side Template Injection (SSTI), which can lead to remote code execution.

Why this priority

High severity
EPSS top 9%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	4.4% (top 9%)
CISA exploited list	No
Weakness	CWE-74
Published	2021-01-08
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: pwntools project

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

Am I affected?

Timeline

2021-01-08 12:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

pwntools project pwntools UPGRADE

Affected: < 4.3.1

Fixed in: 4.3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 4.3.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pwntools

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-2020-28468?

pwntools: upgrade to 4.3.1. Exact commands for each OS are on this page.

Is CVE-2020-28468 being exploited?

CVE-2020-28468 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-2020-28468 affect?

CVE-2020-28468 affects pwntools. Severity is high (CVSS 8.1). This affects the package pwntools before 4.3.1. The shellcraft generator for affected versions of this module are vulnerable to Server-Side Template Injection (SSTI), which can lead to remote code execution.

How urgent is CVE-2020-28468?

Priority 61/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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