CVE-2020-5840: An issue was discovered in HashBrown CMS before 1.3.2

Q: How do I fix CVE-2020-5840?

hashbrown cms: upgrade to 1.3.2. Exact commands for each OS are on this page.

Q: Is CVE-2020-5840 being exploited?

CVE-2020-5840 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-2020-5840 affect?

CVE-2020-5840 affects hashbrown cms. Severity is high (CVSS 7.5). An issue was discovered in HashBrown CMS before 1.3.2. Server/Entity/Resource/Connection.js allows an attacker to reach a parent directory via a crafted name or ID field.

Q: How urgent is CVE-2020-5840?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2020-5840 is a high-severity flaw (CVSS 7.5) affecting hashbrown cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in HashBrown CMS before 1.3.2. Server/Entity/Resource/Connection.js allows an attacker to reach a parent directory via a crafted name or ID field.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-22
Published	2020-01-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: hashbrowncms

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

Am I affected?

Timeline

2020-01-06 18:15 UTCPublished CVE record published
2026-06-17 03:22 UTCUpdated Record last modified

hashbrowncms hashbrown cms UPGRADE

Affected: < 1.3.2

Fixed in: 1.3.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy hashbrown-cms || rpm -q hashbrown-cms || hashbrown-cms --version

2. UPGRADE to 1.3.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hashbrown-cms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hashbrown-cms

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-2020-5840?

hashbrown cms: upgrade to 1.3.2. Exact commands for each OS are on this page.

Is CVE-2020-5840 being exploited?

CVE-2020-5840 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-2020-5840 affect?

CVE-2020-5840 affects hashbrown cms. Severity is high (CVSS 7.5). An issue was discovered in HashBrown CMS before 1.3.2. Server/Entity/Resource/Connection.js allows an attacker to reach a parent directory via a crafted name or ID field.

How urgent is CVE-2020-5840?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-6949 HIGH 8.8 UPGRADE A privilege escalation issue was discovered in the postUser function in HashBrown CMS through 1.3.3
CVE-2020-6948 CRITICAL 9.8 UPGRADE A remote code execution issue was discovered in HashBrown CMS through 1.3.3

References

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