CRITICAL
CodeIgniter before 2.2.0 makes it easier for attackers to decode session cookies by leveraging fallback to a custom XOR-based encryption scheme when the Mcrypt extension for PHP is not available
Published Sep 19, 2017
9.8
CRITICALCVSS 3.0
EPSS 37.22%
Description
CodeIgniter before 2.2.0 makes it easier for attackers to decode session cookies by leveraging fallback to a custom XOR-based encryption scheme when the Mcrypt extension for PHP is not available.
Affected products
No data.
- ≤ 2.1.4
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
9.8 CRITICAL NVD
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
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:P/I:N/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
37.22% 0.37222
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.37222
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (23 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 37.22% (0.37222) | 98.48th | v5 (v2026.06.15) |
| Sep 22, 2026 | 37.22% (0.37222) | 98.45th | v5 (v2026.06.15) |
| Sep 21, 2026 | 33.30% (0.33301) | 98.34th | v5 (v2026.06.15) |
| Sep 6, 2026 | 37.22% (0.37222) | 98.42th | v5 (v2026.06.15) |
| Sep 5, 2026 | 33.30% (0.33301) | 98.30th | v5 (v2026.06.15) |
| Aug 30, 2026 | 37.22% (0.37222) | 98.41th | v5 (v2026.06.15) |
| Aug 28, 2026 | 33.30% (0.33301) | 98.29th | v5 (v2026.06.15) |
| Aug 24, 2026 | 37.22% (0.37222) | 98.41th | v5 (v2026.06.15) |
| Aug 23, 2026 | 33.30% (0.33301) | 98.28th | v5 (v2026.06.15) |
| Jun 15, 2026 | 37.22% (0.37222) | 98.32th | v5 (v2026.06.15) |
| Nov 18, 2025 | 34.04% (0.34041) | 96.74th | v4 (v2025.03.14) |
| Apr 5, 2025 | 31.17% (0.31167) | 96.38th | v4 (v2025.03.14) |
| Mar 17, 2025 | 33.04% (0.33041) | 96.51th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.38% (0.00382) | 73.87th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.38% (0.00382) | 72.27th | v3 (v2023.03.01) |
| Jul 5, 2023 | 0.38% (0.00382) | 69.23th | v3 (v2023.03.01) |
| May 8, 2023 | 0.69% (0.00692) | 77.19th | v3 (v2023.03.01) |
| Apr 15, 2023 | 0.54% (0.00537) | 73.79th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.76% (0.00761) | 78.30th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
Weaknesses (1)
References (4)
- http://packetstormsecurity.com/files/130609/Seagate-Business-NAS-Unauthenticated-Remote-Command-Execution.html x_refsource_MISCThird Party AdvisoryVDB Entry
- https://beyondbinary.io/articles/seagate-nas-rce/ x_refsource_MISCExploitThird Party Advisory
- https://codeigniter.com/userguide2/changelog.html x_refsource_CONFIRMVendor Advisory
- https://www.dionach.com/blog/codeigniter-session-decoding-vulnerability x_refsource_MISCThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/130609/Seagate-Business-NAS-Unauthenticated-Remote-Command-Execution.html | x_refsource_MISCThird Party AdvisoryVDB Entry | |
| https://beyondbinary.io/articles/seagate-nas-rce/ | x_refsource_MISCExploitThird Party Advisory | |
| https://codeigniter.com/userguide2/changelog.html | x_refsource_CONFIRMVendor Advisory | |
| https://www.dionach.com/blog/codeigniter-session-decoding-vulnerability | x_refsource_MISCThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Sep 19, 2017
Updated Aug 6, 2024
Reserved Nov 9, 2014
Link CVE-2014-8686
CISA Vulnrichment
Updated n/a