CVE-2017-1000071: apereo phpcas Improper Authentication
CVSS: 8.1v3.0HighModified
AliasesUBUNTU-CVE-2017-1000071DEBIAN-CVE-2017-1000071
Published 13-07-2017Last modified 05-08-2024
Vulnerability summary
CVE-2017-1000071 is a high (CVSS 8.1) Improper Authentication vulnerability in apereo phpcas. EPSS estimates a 3.51% chance of exploitation in the next 30 days, higher than 89% of scored vulnerabilities.
CVSS score
8.1/10
010
High · v3.0 (NVD)EPSS score
3.51%
0%100%
Low · -0.04 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 13-07-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Jasig phpCAS version 1.3.4 is vulnerable to an authentication bypass in the validateCAS20 function when configured to authenticate against an old CAS server.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 8.1Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.1HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
3.51%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
-0.04 pp
From 3.56% on 20-09-2026
20-09-202620-10-2026
EPSS score3.51%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Apereo1 product
- phpcas1.3.4
Debian1 product
- php-cas< 1.3.6-1
Ubuntu1 product
- php-casAll versions (No fix recorded)
3 vendors · 3 products
