The vB_Api_Hook::decodeArguments method in vBulletin 5 Connect 5.1.2 through 5.1.9 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via a crafted serialized object in the arguments parameter to ajax/api/hook/decodeArguments
Published Nov 24, 2015
7.5
HIGHCVSS 2.0
EPSS 80.64%
Description
The vB_Api_Hook::decodeArguments method in vBulletin 5 Connect 5.1.2 through 5.1.9 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via a crafted serialized object in the arguments parameter to ajax/api/hook/decodeArguments.
Affected products
No data.
- 5.0.0
- 5.0.1
- 5.0.2
- 5.0.3
- 5.0.4
- 5.0.5
- 5.1.0
- 5.1.0
- 5.1.1
- 5.1.2
- 5.1.2
- 5.1.2
- 5.1.2
- 5.1.3
- 5.1.3
- 5.1.4
- 5.1.5
- 5.1.6
- 5.1.7
- 5.1.8
- 5.1.9
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.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 80.64% (0.80635) | 99.62th | v5 (v2026.06.15) |
| Jun 15, 2026 | 80.64% (0.80635) | 99.57th | v5 (v2026.06.15) |
| May 11, 2026 | 79.04% (0.79043) | 99.08th | v4 (v2025.03.14) |
| Feb 6, 2026 | 77.36% (0.77364) | 98.94th | v4 (v2025.03.14) |
| Dec 18, 2025 | 79.04% (0.79043) | 99.01th | v4 (v2025.03.14) |
| Mar 17, 2025 | 85.39% (0.85394) | 99.33th | v4 (v2025.03.14) |
| Dec 17, 2024 | 72.26% (0.72257) | 98.26th | v3 (v2023.03.01) |
| Jun 18, 2024 | 76.05% (0.76046) | 98.19th | v3 (v2023.03.01) |
| Oct 18, 2023 | 74.24% (0.74237) | 97.77th | v3 (v2023.03.01) |
| Sep 16, 2023 | 76.50% (0.76498) | 97.80th | v3 (v2023.03.01) |
| Mar 7, 2023 | 72.14% (0.72143) | 97.47th | v3 (v2023.03.01) |
| Mar 6, 2023 | 82.15% (0.82150) | 99.56th | v2 (v2022.01.01) |
| Feb 4, 2022 | 82.15% (0.82150) | 99.48th | v2 (v2022.01.01) |
References (6)
- http://blog.checkpoint.com/2015/11/05/check-point-discovers-critical-vbulletin-0-day/ x_refsource_MISCExploit
- http://packetstormsecurity.com/files/134331/vBulletin-5.1.2-Unserialize-Code-Execution.html x_refsource_MISCExploit
- http://pastie.org/pastes/10527766/text?key=wq1hgkcj4afb9ipqzllsq x_refsource_MISCExploit
- http://www.rapid7.com/db/modules/exploit/multi/http/vbulletin_unserialize x_refsource_MISCExploit
- https://blog.sucuri.net/2015/11/vbulletin-exploits-in-the-wild.html x_refsource_MISCExploit
- https://www.exploit-db.com/exploits/38629/ exploitx_refsource_EXPLOIT-DB
| Link | Providers | Tags |
|---|---|---|
| http://blog.checkpoint.com/2015/11/05/check-point-discovers-critical-vbulletin-0-day/ | x_refsource_MISCExploit | |
| http://packetstormsecurity.com/files/134331/vBulletin-5.1.2-Unserialize-Code-Execution.html | x_refsource_MISCExploit | |
| http://pastie.org/pastes/10527766/text?key=wq1hgkcj4afb9ipqzllsq | x_refsource_MISCExploit | |
| http://www.rapid7.com/db/modules/exploit/multi/http/vbulletin_unserialize | x_refsource_MISCExploit | |
| https://blog.sucuri.net/2015/11/vbulletin-exploits-in-the-wild.html | x_refsource_MISCExploit | |
| https://www.exploit-db.com/exploits/38629/ | exploitx_refsource_EXPLOIT-DB |
Change history (0)
No recorded changes yet.