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CVE-2022-25304

24
FAUCET Score

CVE-2022-25304 is a Denial of Service (DoS) vulnerability affecting all versions of the 'opcua' and 'asyncua' packages. An attacker can exploit this by sending an unlimited number of large data chunks without a final closing chunk, overwhelming the server. This vulnerability has a CVSS score of 7.5 (HIGH), indicating a network-based attack with low complexity and a high impact on availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:asyncua_project:asyncua:*:*:*:*:*:python:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:opcua_project:opcua:*:*:*:*:*:python:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.06%
Probability of exploitation in next 30 days
EPSS Percentile
61.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0106 is in the 38th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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)

pippatch availablevia ghsa
Product: asyncuaFixed in: 0.9.96

Vendor Advisories (1)

pipGHSA-mfpj-3qhm-976mhigh

Uncontrolled Resource Consumption in asyncua and opcua

Aug 24, 2022

References

github.com / FreeOpcUa/python-opcua/issues/1466
Issue TrackingThird Party Advisory
security.snyk.io / vuln/SNYK-PYTHON-ASYNCUA-2988731
Third Party Advisory
security.snyk.io / vuln/SNYK-PYTHON-OPCUA-2988730
Third Party Advisory