CVE-2018-6520
CVE-2018-6520 is a medium-severity vulnerability in Simplesamlphp with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 5.8
- EPSS exploit prediction: 1% (54th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-601
- Affected product: Simplesamlphp
- Published:
- Last modified:
Description
SimpleSAMLphp before 1.15.2 allows remote attackers to bypass an open redirect protection mechanism via crafted authority data in a URL.
Frequently asked questions
- What is CVE-2018-6520?
- SimpleSAMLphp before 1.15.2 allows remote attackers to bypass an open redirect protection mechanism via crafted authority data in a URL.
- How severe is CVE-2018-6520?
- CVE-2018-6520 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2018-6520 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-6520?
- CVE-2018-6520 affects Simplesamlphp. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-6520?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2018-6520 published?
- CVE-2018-6520 was published on 2018-02-02 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*
More vulnerabilities in Simplesamlphp
- CVE-2018-6521 — Critical (CVSS 9.8): The sqlauth module in SimpleSAMLphp before 1.15.2 relies on the MySQL utf8 charset, which truncates queries upon…
- CVE-2017-12873 — Critical (CVSS 9.8): SimpleSAMLphp 1.7.0 through 1.14.10 might allow attackers to obtain sensitive information, gain unauthorized access, or…
- CVE-2017-12868 — Critical (CVSS 9.8): The secureCompare method in lib/SimpleSAML/Utils/Crypto.php in SimpleSAMLphp 1.14.13 and earlier, when used with PHP…
- CVE-2016-9814 — Critical (CVSS 9.1): The validateSignature method in the SAML2\Utils class in SimpleSAMLphp before 1.14.10 and simplesamlphp/saml2 library…
- CVE-2019-3465 — High (CVSS 8.8): Rob Richards XmlSecLibs, all versions prior to v3.0.3, as used for example by SimpleSAMLphp, performed incorrect…
- CVE-2018-7711 — High (CVSS 8.1): HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the…
All CVEs affecting Simplesamlphp →
Other CWE-601 (Open Redirect) vulnerabilities
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