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CVE-2021-41733

22
FAUCET Score

CVE-2021-41733 describes an open redirect vulnerability in Oppia version 3.1.4, where the application fails to validate URLs before redirection. This medium-severity vulnerability (CVSS 6.1) has a network attack vector, low attack complexity, and requires user interaction, potentially leading to information disclosure and integrity impacts. While there is no evidence of active exploitation, nor publicly available exploit code in Metasploit, Nuclei, or ExploitDB, the vulnerability has garnered some community discussion, indicating awareness.

Impacted Technologies

VendorProductVersion(s)CPE
3.1.4CPE matchmatch criteria
cpe:2.3:a:oppia:oppia:3.1.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.72%
Probability of exploitation in next 30 days
EPSS Percentile
50.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 56th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / oppia/oppia/pull/13892
PatchThird Party Advisory