How severe is CVE-2021-42556?

CVE-2021-42556 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-42556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42556?

CVE-2021-42556 affects Rasa Rasa X. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42556?

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

When was CVE-2021-42556 published?

CVE-2021-42556 was published on 2021-10-22 and last updated on 2026-06-17.

CVE-2021-42556

CVE-2021-42556 is a medium-severity vulnerability in Rasa Rasa X with a CVSS 3.x base score of 5.5. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Rasa Rasa X
Published: 2021-10-22
Last modified: 2026-06-17

Description

Rasa X before 0.42.4 allows Directory Traversal during archive extraction. In the functionality that allows a user to load a trained model archive, an attacker has arbitrary write capability within specific directories via a crafted archive file.

Frequently asked questions

What is CVE-2021-42556?: Rasa X before 0.42.4 allows Directory Traversal during archive extraction. In the functionality that allows a user to load a trained model archive, an attacker has arbitrary write capability within specific directories via a crafted archive file.
How severe is CVE-2021-42556?: CVE-2021-42556 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-42556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42556?: CVE-2021-42556 affects Rasa Rasa X. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42556?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-42556 published?: CVE-2021-42556 was published on 2021-10-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rasa:rasa_x:*:*:*:*:*:*:*:*

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