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CVE-2018-6520

19
FAUCET Score

CVE-2018-6520 describes an open redirect bypass vulnerability in SimpleSAMLphp versions prior to 1.15.2, allowing remote attackers to redirect users to arbitrary sites through crafted URLs. With a CVSS score of 6.1 (Medium), this vulnerability requires user interaction and could lead to information disclosure or phishing attacks. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.12.0, < 1.15.1CPE matchmatch criteria
cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.84%
Probability of exploitation in next 30 days
EPSS Percentile
54.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0084 is in the 64th percentile among its peer group of 26,236 CVEs.

Social Chatter

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

composerpatch availablevia ghsa
Product: simplesamlphp/simplesamlphpFixed in: 1.15.2

Vendor Advisories (1)

composerGHSA-2qfc-48v5-4w5hmedium

SimpleSAMLphp Open redirection protection bypass

May 14, 2022

References

simplesamlphp.org / security/201801-02
Vendor Advisory