CVE-2021-32826: Proxyee-Down is open source proxy software

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MEDIUM 6.8REMOTEMITIGATE

CVE-2021-32826 is a medium-severity flaw (CVSS 6.8) affecting proxyee-down. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Proxyee-Down is open source proxy software. An attacker being able to provide an extension script (eg: through a MiTM attack or by hosting a malicious extension) may be able to run arbitrary commands on the system running Proxyee-Down. For more details including a PoC see the referenced GHSL-2021-053. As of the writing of this CVE there is currently no patched version.

Why this priority

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	6.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-78
Published	2021-08-16
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: proxyee-down project

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

Am I affected?

Timeline

2021-08-16 21:15 UTCPublished CVE record published
2026-06-17 03:53 UTCUpdated Record last modified

proxyee-down project proxyee-down MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy proxyee-down || rpm -q proxyee-down || proxyee-down --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2021-32826?

proxyee-down: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-32826 being exploited?

CVE-2021-32826 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-2021-32826 affect?

CVE-2021-32826 affects proxyee-down. Severity is medium (CVSS 6.8). Proxyee-Down is open source proxy software. An attacker being able to provide an extension script (eg: through a MiTM attack or by hosting a malicious extension) may be able to run arbitrary commands on the system running Proxyee-Down. For

How urgent is CVE-2021-32826?

Priority 50/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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