How severe is CVE-2021-41733?

CVE-2021-41733 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-41733 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41733?

CVE-2021-41733 affects Oppia. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41733?

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

When was CVE-2021-41733 published?

CVE-2021-41733 was published on 2021-11-08 and last updated on 2026-06-17.

CVE-2021-41733

CVE-2021-41733 is a medium-severity vulnerability in Oppia with a CVSS 3.x base score of 6.1. 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: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Oppia
Published: 2021-11-08
Last modified: 2026-06-17

Description

Oppia 3.1.4 does not verify that certain URLs are valid before navigating to them.

Frequently asked questions

What is CVE-2021-41733?: Oppia 3.1.4 does not verify that certain URLs are valid before navigating to them.
How severe is CVE-2021-41733?: CVE-2021-41733 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-41733 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41733?: CVE-2021-41733 affects Oppia. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41733?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41733 published?: CVE-2021-41733 was published on 2021-11-08 and last updated on 2026-06-17.

References

https://github.com/oppia/oppia/pull/13892

Affected products (1)

cpe:2.3:a:oppia:oppia:3.1.4:*:*:*:*:*:*:*

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