CVE-2019-12479: An issue was discovered in 20|20 Storage 2.11.0

This week

CRITICAL 9.1REMOTEDOWNGRADE

CVE-2019-12479 is a critical-severity flaw (CVSS 9.1) affecting twentytwenty.storage. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in 20|20 Storage 2.11.0. A Path Traversal vulnerability in the TwentyTwenty.Storage library in the LocalStorageProvider allows creating and reading files outside of the specified basepath. If the application using this library does not sanitize user-supplied filenames, then this issue may be exploited to read or write arbitrary files. This affects LocalStorageProvider.cs.

Why this priority

Critical severity
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	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-22
Published	2019-08-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: twentytwenty.storage project

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

Am I affected?

Timeline

2019-08-13 21:15 UTCPublished CVE record published
2026-06-17 02:14 UTCUpdated Record last modified

twentytwenty.storage project twentytwenty.storage DOWNGRADE

Affected: 2.11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.11.0

1. Check installed version

apt-cache policy twentytwenty.storage || rpm -q twentytwenty.storage || twentytwenty.storage --version

2. No fixed release: DOWNGRADE to a release before 2.11.0 (Debian / Ubuntu)

apt-cache madison twentytwenty.storage sudo apt install twentytwenty.storage=<VERSION_BEFORE_2.11.0> sudo apt-mark hold twentytwenty.storage

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

dnf --showduplicates list twentytwenty.storage sudo dnf downgrade twentytwenty.storage-<VERSION_BEFORE_2.11.0> sudo dnf versionlock add twentytwenty.storage

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-2019-12479?

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

Is CVE-2019-12479 being exploited?

CVE-2019-12479 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-2019-12479 affect?

CVE-2019-12479 affects twentytwenty.storage. Severity is critical (CVSS 9.1). An issue was discovered in 20|20 Storage 2.11.0. A Path Traversal vulnerability in the TwentyTwenty.Storage library in the LocalStorageProvider allows creating and reading files outside of the specified basepath. If the application using th

How urgent is CVE-2019-12479?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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