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CVE-2018-20595

27
FAUCET Score

CVE-2018-20595 describes a Cross-Site Request Forgery (CSRF) vulnerability in hsweb version 3.0.4, specifically within the OAuth2 client controller. This high-severity flaw, rated 8.8 CVSSv3, stems from the application failing to validate the "state" parameter between the request and session after successful user authentication. An attacker could leverage this to trick authenticated users into performing unintended actions, potentially leading to high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.4CPE matchmatch criteria
cpe:2.3:a:hsweb:hsweb:3.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.64%
Probability of exploitation in next 30 days
EPSS Percentile
46.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0064 is in the 48th percentile among its peer group of 14,825 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

mavenGHSA-4rm3-4mq4-mfwrhigh

Cross-Site Request Forgery (CSRF) in hswebframework.web:hsweb-commons

Jan 4, 2019

References

github.com / hs-web/hsweb-framework/commit/40929e9b0d336a26281a5ed2e0e721d54dd8d2f2
PatchThird Party Advisory
github.com / hs-web/hsweb-framework/issues/107
ExploitIssue TrackingThird Party Advisory