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CVE-2017-12868

29
FAUCET Score

CVE-2017-12868 is a critical vulnerability affecting SimpleSAMLphp versions 1.14.13 and earlier, specifically when used with PHP versions prior to 5.6. It allows attackers to perform session fixation or bypass authentication due to missing character conversions in the secureCompare method before an XOR operation. With a CVSS score of 9.8 (Critical), this vulnerability is network-exploitable with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.14.13CPE matchmatch criteria
cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.13%
Probability of exploitation in next 30 days
EPSS Percentile
80.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0213 is in the 69th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: simplesamlphp/simplesamlphpFixed in: 1.14.14
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-j96g-47x2-46hvcritical

SimpleSAMLphp Session fixation issue and authentication bypass in the authcrypt module

May 14, 2022

References

github.com / simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df71f1b85e
Issue TrackingPatchThird Party Advisory
lists.debian.org / debian-lts-announce/2017/12/msg00007.html
lists.debian.org / debian-lts-announce/2018/06/msg00017.html
simplesamlphp.org / security/201705-01
PatchVendor Advisory