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CVE-2021-33880

22
FAUCET Score

CVE-2021-33880 describes an observable timing discrepancy in the aaugustin websockets library before version 9.1 for Python, specifically when HTTP Basic Authentication is enabled. This vulnerability allows an unauthenticated attacker to potentially guess passwords through a timing attack, impacting products like Oracle Communications Cloud Native Core components and other applications using the affected websockets library. Rated Medium severity with a CVSS score of 5.9, the attack requires high complexity but could lead to high confidentiality impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 9.1CPE matchmatch criteria
cpe:2.3:a:websockets_project:websockets:*:*:*:*:*:python:*:*
1.14.0CPE matchmatch criteria
cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*
1.5.0CPE matchmatch criteria
cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:1.5.0:*:*:*:*:*:*:*
1.14.0CPE matchmatch criteria
cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.14.0:*:*:*:*:*:*:*
1.14.0CPE matchmatch criteria
cpe:2.3:a:oracle:communications_cloud_native_core_unified_data_repository:1.14.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.27%
Probability of exploitation in next 30 days
EPSS Percentile
81.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0226 is in the 69th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
oraclepatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: websocketsFixed in: 9.1

Vendor Advisories (1)

pipGHSA-8ch4-58qp-g3mphigh

Observable Timing Discrepancy in aaugustin websockets library

Jun 11, 2021

References

github.com / aaugustin/websockets/commit/547a26b685d08cac0aa64e5e65f7867ac0ea9bc0
PatchThird Party Advisory
oracle.com / security-alerts/cpuapr2022.html
PatchThird Party Advisory
oracle.com / security-alerts/cpujan2022.html
PatchThird Party Advisory