How severe is CVE-2024-33661?

CVE-2024-33661 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2024-33661 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-33661?

CVE-2024-33661 affects Portainer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-33661?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-33661 have an EU (EUVD) identifier?

Yes. CVE-2024-33661 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-31377.

When was CVE-2024-33661 published?

CVE-2024-33661 was published on 2024-04-26 and last updated on 2026-06-17.

CVE-2024-33661

CVE-2024-33661 is a critical-severity vulnerability in Portainer with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-31377
Weakness: CWE-601
Affected product: Portainer
Published: 2024-04-26
Last modified: 2026-06-17

Description

Portainer before 2.20.0 allows redirects when the target is not index.yaml.

Frequently asked questions

What is CVE-2024-33661?: Portainer before 2.20.0 allows redirects when the target is not index.yaml.
How severe is CVE-2024-33661?: CVE-2024-33661 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2024-33661 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-33661?: CVE-2024-33661 affects Portainer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-33661?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-33661 have an EU (EUVD) identifier?: Yes. CVE-2024-33661 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-31377.
When was CVE-2024-33661 published?: CVE-2024-33661 was published on 2024-04-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:portainer:portainer:*:*:*:*:*:*:*:*

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CVE-2020-24264 — Critical (CVSS 9.8): Portainer 1.24.1 and earlier is affected by incorrect access control that may lead to remote arbitrary code execution.…
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CVE-2018-19367 — Critical (CVSS 9.8): Portainer through 1.19.2 provides an API endpoint (/api/users/admin/check) to verify that the admin user is already…

All CVEs affecting Portainer →

Other CWE-601 (Open Redirect) vulnerabilities

CVE-2018-3774 — Critical (CVSS 10.0): Incorrect parsing in url-parse <1.4.3 returns wrong hostname which leads to multiple vulnerabilities such as SSRF, Open…
CVE-2019-25282 — Critical (CVSS 9.8): V-SOL GPON/EPON OLT Platform v2.03 contains an open redirect vulnerability in the script that allows attackers to…
CVE-2020-36912 — Critical (CVSS 9.8): Plexus anblick Digital Signage Management 3.1.13 contains an open redirect vulnerability in the 'PantallaLogin' script…
CVE-2025-43526 — Critical (CVSS 9.8): This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac…
CVE-2025-55031 — Critical (CVSS 9.8): Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An…
CVE-2024-22891 — Critical (CVSS 9.8): Nteract v.0.28.0 was discovered to contain a remote code execution (RCE) vulnerability via the Markdown link.

Browse all CWE-601 (Open Redirect) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

144.217.74.127 (ipv4-addr)