How severe is CVE-2023-33251?

CVE-2023-33251 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-33251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-33251?

CVE-2023-33251 affects Lightbend Akka Http. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-33251?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-33251 published?

CVE-2023-33251 was published on 2023-05-21 and last updated on 2026-06-17.

CVE-2023-33251

CVE-2023-33251 is a medium-severity vulnerability in Lightbend Akka Http with a CVSS 3.x base score of 4.7. 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-732.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Lightbend Akka Http
Published: 2023-05-21
Last modified: 2026-06-17

Description

When Akka HTTP before 10.5.2 accepts file uploads via the FileUploadDirectives.fileUploadAll directive, the temporary file it creates has too weak permissions: it is readable by other users on Linux or UNIX, a similar issue to CVE-2022-41946.

Frequently asked questions

What is CVE-2023-33251?: When Akka HTTP before 10.5.2 accepts file uploads via the FileUploadDirectives.fileUploadAll directive, the temporary file it creates has too weak permissions: it is readable by other users on Linux or UNIX, a similar issue to CVE-2022-41946.
How severe is CVE-2023-33251?: CVE-2023-33251 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-33251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-33251?: CVE-2023-33251 affects Lightbend Akka Http. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-33251?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-33251 published?: CVE-2023-33251 was published on 2023-05-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lightbend:akka_http:*:*:*:*:*:*:*:*

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