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CVE-2018-1000165

22
FAUCET Score

CVE-2018-1000165 describes an Incorrect Access Control vulnerability in LightSAML versions prior to 1.3.5, specifically within the signature validation of its XML Digital Signature (XMLDSig) readers. This flaw allows an attacker to impersonate any user from an Identity Provider. The vulnerability has a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely with low complexity and no user interaction, leading to high integrity impact (impersonation). While the vulnerability is not listed on the KEV catalog and there's no public exploit code or active exploitation reported, it's crucial for affected organizations to update to LightSAML 1.3.5 or later to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.3.5CPE matchmatch criteria
cpe:2.3:a:lightsaml:lightsaml:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.27%
Probability of exploitation in next 30 days
EPSS Percentile
66.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0127 is in the 46th percentile among its peer group of 51,466 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 (2)

composerpatch availablevia ghsa
Product: lightsaml/lightsamlFixed in: 1.3.5
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-vg4f-8v9q-5c3xhigh

LightSAML Incorrect Access Control vulnerability

May 13, 2022

References

github.com / lightSAML/lightSAML/commit/47cef07bb09779df15620799f3763d1b8d32307a
PatchThird Party Advisory
github.com / lightSAML/lightSAML/releases/tag/1.3.5
Third Party Advisory