Cyber Resilience

CVE-2021-33254

HighPublic PoC

Published: 02 June 2022

Published
02 June 2022
Modified
21 November 2024
KEV Added
—
Patch
09 May 2021
CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0046 64.8th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-33254 is a high-severity NULL Pointer Dereference (CWE-476) vulnerability in Embedthis Appweb. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 35.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

An issue was discovered in src/http/httpLib.c in EmbedThis Appweb Community Edition 8.2.1, allows attackers to cause a denial of service via the stream paramter to the parseUri function.

CWE(s)
CWE-476

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

embedthis
appweb
8.2.1

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References