Is CVE-2017-12868 in the CISA KEV catalog?

No. CVE-2017-12868 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-12868?

CVE-2017-12868 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2017-12868?

CVE-2017-12868 has an EPSS score of 2.13% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-12868?

Upgrade simplesamlphp on debian 11 to 1.14.15-1 or later.

CVE & CISA-KEV Catalog

CVE-2017-12868

CRITICALEPSS 80th pctl

9.8

CVSS v3

NVD

Description

The secureCompare method in lib/SimpleSAML/Utils/Crypto.php in SimpleSAMLphp 1.14.13 and earlier, when used with PHP before 5.6, allows attackers to conduct session fixation attacks or possibly bypass authentication by leveraging missing character conversions before an XOR operation.

CWE-384

How to fix

Remediation Available

simplesamlphpDebian

Fixed in:1.14.15-1CVE-2017-12868

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.13%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Patch2

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.