CVE-2017-17672 in the critical feed json
In vBulletin through 5.3.x, there is an unauthenticated deserialization vulnerability that leads to arbitrary file deletion and, under cert…
published 2017-12-14 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-8829
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 15.2%
- EPSS 15.2% chance of exploitation in 30 days, percentile 96%
- public exploits
- 1
- Exploit-DB
Summary
In vBulletin through 5.3.x, there is an unauthenticated deserialization vulnerability that leads to arbitrary file deletion and, under certain circumstances, code execution, because of unsafe usage of PHP's unserialize() in vB_Library_Template's cacheTemplates() function, which is a publicly exposed API. This is exploited with the templateidlist parameter to ajax/api/template/cacheTemplates.
Timeline
- First public exploit (EDB-43362)
- Published
Exploit prediction
15.19% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-43362 vBulletin 5.x - 'cacheTemplates' Remote Arbitrary File Deletion webapps, 2017-12-13
- blogs.securiteam.com https://blogs.securiteam.com/index.php/archives/3573 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
exploit-db.com
/exploits/43362/
exploit, third-party-advisory, vdb-entry
-
blogs.securiteam.com
/index.php/archives/3573
exploit, third-party-advisory
Sources
- CVE List CVE-2017-17672
- NVD CVE-2017-17672
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.