CVE-2021-26939: An information disclosure issue exists in henriquedornas 5.2.17 because an attacker can dump phpMyAdmin SQL co

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HIGH 7.5REMOTEDOWNGRADE

CVE-2021-26939 is a high-severity flaw (CVSS 7.5) affecting henriquedornas. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An information disclosure issue exists in henriquedornas 5.2.17 because an attacker can dump phpMyAdmin SQL content. NOTE: third parties report that this is a site-specific problem

Why this priority

High 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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Published	2021-02-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: henriquedornas

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

Am I affected?

Timeline

2021-02-10 18:15 UTCPublished CVE record published
2026-06-17 03:44 UTCUpdated Record last modified

henriquedornas henriquedornas DOWNGRADE

Affected: 5.2.17

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.2.17

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.2.17 (Debian / Ubuntu)

apt-cache madison henriquedornas sudo apt install henriquedornas=<VERSION_BEFORE_5.2.17> sudo apt-mark hold henriquedornas

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

dnf --showduplicates list henriquedornas sudo dnf downgrade henriquedornas-<VERSION_BEFORE_5.2.17> sudo dnf versionlock add henriquedornas

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-2021-26939?

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

Is CVE-2021-26939 being exploited?

CVE-2021-26939 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-2021-26939 affect?

CVE-2021-26939 affects henriquedornas. Severity is high (CVSS 7.5). An information disclosure issue exists in henriquedornas 5.2.17 because an attacker can dump phpMyAdmin SQL content. NOTE: third parties report that this is a site-specific problem

How urgent is CVE-2021-26939?

Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

phpMyAdmin vulnerabilities

Related CVEs

CVE-2021-26938 MEDIUM 5.4 DOWNGRADE A stored XSS issue exists in henriquedornas 5.2.17 via online live chat

References

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