CVE-2018-18903
CVE-2018-18903 is a critical-severity vulnerability in Vanillaforums Vanilla with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 5% (91st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-94
- Affected product: Vanillaforums Vanilla
- Published:
- Last modified:
Description
Vanilla 2.6.x before 2.6.4 allows remote code execution.
Frequently asked questions
- What is CVE-2018-18903?
- Vanilla 2.6.x before 2.6.4 allows remote code execution.
- How severe is CVE-2018-18903?
- CVE-2018-18903 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-18903 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-18903?
- CVE-2018-18903 affects Vanillaforums Vanilla. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-18903?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2018-18903 published?
- CVE-2018-18903 was published on 2018-11-03 and last updated on 2026-06-17.
References
- https://github.com/vanilla/vanilla/releases/tag/Vanilla_2.6.4
- https://open.vanillaforums.com/discussion/36771/security-update-vanilla-2-6-4
- https://srcincite.io/blog/2018/10/02/old-school-pwning-with-new-school-tricks-vanilla-forums-remote-code-execution.html
Affected products (1)
- cpe:2.3:a:vanillaforums:vanilla:*:*:*:*:*:*:*:*
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