HIGH
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
Published Jul 13, 2017
8.1
HIGHCVSS 3.0
EPSS 3.51%
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
8.1 HIGH NVD
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
6.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.51% 0.03513
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03513
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.51% (0.03513) | 88.82th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.53% (0.03527) | 87.70th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.25% (0.00249) | 45.37th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.76% (0.02758) | 76.67th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.25% (0.00249) | 46.27th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.45% (0.00445) | 75.78th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.45% (0.00445) | 74.20th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.45% (0.00445) | 71.77th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.42% (0.00416) | 70.06th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.49% (0.12492) | 89.83th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.63% (0.03630) | 71.73th | v5 (v2026.06.15) |
| Apr 14, 2021 | 3.63% (0.03630) | 0.00th | v1 |
Weaknesses (1)
References (3)
- http://www.securityfocus.com/bid/99609 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://github.com/Jasig/phpCAS/blob/master/docs/ChangeLog x_refsource_CONFIRMThird Party Advisory
- https://github.com/Jasig/phpCAS/issues/228 x_refsource_CONFIRMThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/99609 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://github.com/Jasig/phpCAS/blob/master/docs/ChangeLog | x_refsource_CONFIRMThird Party Advisory | |
| https://github.com/Jasig/phpCAS/issues/228 | x_refsource_CONFIRMThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jul 13, 2017
Updated Aug 5, 2024
Reserved Jul 10, 2017
Link CVE-2017-1000071
CISA Vulnrichment
Updated n/a