CVE-2021-41826

Q: How do I fix CVE-2021-41826?

Upgrade placeos authentication to 1.29.10.0 or later.

Q: Is CVE-2021-41826 being actively exploited?

Not that we know of. CVE-2021-41826 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 12.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 96% of all scored CVEs.

Q: How severe is CVE-2021-41826?

CVE-2021-41826 has a CVSS v3 base score of 6.1, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2021-41826 affect?

Published advisories record a fix for placeos authentication (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUMEPSS 96th pctl

6.1

CVSS v3

NVD

Description

PlaceOS Authentication Service before 1.29.10.0 allows app/controllers/auth/sessions_controller.rb open redirect.

CWE-601Open Redirect

How to fix

Remediation Available

placeos authenticationNVD

Affected:< 1.29.10.0Fixed in:1.29.10.0CVE-2021-41826derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Intelligence

12.06%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

Patch1

github.com

Exploit1

packetstormsecurity.com

Related Vulnerabilities

Other CWE-601 (Open Redirect) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-4123	High	7.6	97%	-	Fix
CVE-2018-11784	Medium	4.3	94%	-	Fix
CVE-2021-22881	Medium	6.1	87%	-	Fix
CVE-2022-45402	Medium	6.1	82%	-	Fix
CVE-2017-1000117	High	8.8	76%	-	Fix
CVE-2019-10098	Medium	6.1	74%	-	Fix

Common questions

How do I fix CVE-2021-41826?

Upgrade placeos authentication to 1.29.10.0 or later.

Is CVE-2021-41826 being actively exploited?

Not that we know of. CVE-2021-41826 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 12.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 96% of all scored CVEs.

How severe is CVE-2021-41826?

CVE-2021-41826 has a CVSS v3 base score of 6.1, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2021-41826 affect?

Published advisories record a fix for placeos authentication (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2021-41826

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.