CVE-2017-1000071
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.54%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.54% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- apereo/phpcas
- Source
- cve@mitre.org
EPSS 3.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/99609Third Party Advisory, VDB Entry
- https://github.com/Jasig/phpCAS/blob/master/docs/ChangeLogThird Party Advisory
- https://github.com/Jasig/phpCAS/issues/228Third Party Advisory
- http://www.securityfocus.com/bid/99609Third Party Advisory, VDB Entry
- https://github.com/Jasig/phpCAS/blob/master/docs/ChangeLogThird Party Advisory
- https://github.com/Jasig/phpCAS/issues/228Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.