CVE-2021-47688
WhiteBeam File Truncation Privilege Escalation
Description
In WhiteBeam 0.2.0 through 0.2.1 before 0.2.2, a user with local access to a server can bypass the allow-list functionality because a file can be truncated in the OpenFileDescriptor action before the VerifyCanWrite action is performed.
INFO
Published Date :
June 23, 2025, 8:15 p.m.
Last Modified :
June 17, 2026, 4:18 a.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update WhiteBeam to version 0.2.2.
- Apply vendor patches if available.
- Review file descriptor handling logic.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47688.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47688 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47688
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47688 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47688 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'WhiteBeam', 'product': 'WhiteBeam', 'versions': [{'status': 'affected', 'version': '0.2.0', 'lessThan': '0.2.2', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2021-47688', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2025-06-24T13:46:49.271297Z'} -
New CVE Received by [email protected]
Jun. 23, 2025
Action Type Old Value New Value Added Description In WhiteBeam 0.2.0 through 0.2.1 before 0.2.2, a user with local access to a server can bypass the allow-list functionality because a file can be truncated in the OpenFileDescriptor action before the VerifyCanWrite action is performed. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L Added CWE CWE-696 Added Reference https://github.com/WhiteBeamSec/WhiteBeam/pull/22 Added Reference https://github.com/WhiteBeamSec/WhiteBeam/security/advisories/GHSA-3f8r-9483-pfxj Added Reference https://github.com/WhiteBeamSec/WhiteBeam/security/policy