CVE-2020-11722: Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via

Q: How do I fix CVE-2020-11722?

dungeon crawl stone soup: upgrade to 0.25. Exact commands for each OS are on this page.

Q: Is CVE-2020-11722 being exploited?

CVE-2020-11722 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-2020-11722 affect?

CVE-2020-11722 affects dungeon crawl stone soup. Severity is critical (CVSS 9.8). Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

Q: How urgent is CVE-2020-11722?

Priority 62/100. Critical severity; EPSS top 10%: very likely to be exploited; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2020-11722 is a critical-severity flaw (CVSS 9.8) affecting dungeon crawl stone soup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

Why this priority

Critical severity
EPSS top 10%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.9% (top 10%)
CISA exploited list	No
Weakness	CWE-434
Published	2020-04-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dungeon crawl stone soup project

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

Am I affected?

Timeline

2020-04-12 19:15 UTCPublished CVE record published
2026-06-17 02:50 UTCUpdated Record last modified

dungeon crawl stone soup project dungeon crawl stone soup UPGRADE

Affected: < 0.25

Fixed in: 0.25

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dungeon-crawl-stone-soup || rpm -q dungeon-crawl-stone-soup || dungeon-crawl-stone-soup --version

2. UPGRADE to 0.25 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dungeon-crawl-stone-soup

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dungeon-crawl-stone-soup

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-2020-11722?

dungeon crawl stone soup: upgrade to 0.25. Exact commands for each OS are on this page.

Is CVE-2020-11722 being exploited?

CVE-2020-11722 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-2020-11722 affect?

CVE-2020-11722 affects dungeon crawl stone soup. Severity is critical (CVSS 9.8). Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

How urgent is CVE-2020-11722?

Priority 62/100. Critical severity; EPSS top 10%: very likely to be exploited; Remotely exploitable, no login, no user action

References

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