What is CVE-2017-12872?

CVE-2017-12872 is a medium-severity vulnerability in Simplesamlphp, classified under Information Disclosure. CVSS score: 5.9/10. Published 2017-09-01.

How severe is CVE-2017-12872?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Information disclosure in Simplesamlphp

CVE-2017-12872

The (1) Htpasswd authentication source in the authcrypt module and (2) SimpleSAML_Session class in SimpleSAMLphp 1.14.11 and earlier allow remote attackers to conduct timing side-channel attacks by leveraging use of the standard comparison operator to compare secret material against user input.

Vulnerability class: Information Disclosure

Published 2017-09-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.015 (72.7th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.015 · change: +0.000

Affected products

Simplesamlphp
Debian Linux — versions 7.0, 8.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

simplesamlphp.org/security/201703-01 (Patch, Vendor Advisory)
lists.debian.org/debian-lts-announce/2017/12/msg00007.html (mailing-list, Mailing List, Third Party Advisory)
lists.debian.org/debian-lts-announce/2018/06/msg00017.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2017-12872?: CVE-2017-12872 is a medium-severity vulnerability in Simplesamlphp, classified under Information Disclosure. CVSS score: 5.9/10. Published 2017-09-01.
How severe is CVE-2017-12872?: Medium severity. CVSS v3 base score is 5.9 out of 10.