CVE-2020-15128
MEDIUMDescription
In OctoberCMS before version 1.0.468, encrypted cookie values were not tied to the name of the cookie the value belonged to. This meant that certain classes of attacks that took advantage of other theoretical vulnerabilities in user facing code (nothing exploitable in the core project itself) had a higher chance of succeeding. Specifically, if your usage exposed a way for users to provide unfiltered user input and have it returned to them as an encrypted cookie (ex. storing a user provided search query in a cookie) they could then use the generated cookie in place of other more tightly controlled cookies; or if your usage exposed the plaintext version of an encrypted cookie at any point to the user they could theoretically provide encrypted content from your application back to it as an encrypted cookie and force the framework to decrypt it for them. Issue has been fixed in build 468 (v1.0.468).
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 49% of all known CVEs.
References
Related Vulnerabilities
Other CWE-565 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2026-0257 | Critical | 9.1 | 94% | KEV + Ransom | Fix |
| CVE-2023-35885 | Critical | 9.8 | 75% | - | Fix |
| CVE-2025-64447 | High | 8.1 | 8.4% | - | - |
| CVE-2008-5784 | Critical | 9.8 | 7.1% | - | - |
| CVE-2020-7070 | Medium | 4.3 | 5.0% | - | Fix |
| CVE-2025-65212 | Critical | 9.8 | 4.7% | - | Fix |
Common questions
How do I fix CVE-2020-15128?
Upgrade october to 1.0.468 or later.
Is CVE-2020-15128 being actively exploited?
Not that we know of. CVE-2020-15128 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.69% is the estimated probability that it will be exploited in the next 30 days. That is higher than 49% of all scored CVEs.
How severe is CVE-2020-15128?
CVE-2020-15128 has a CVSS v3 base score of 6.1, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2020-15128 affect?
Published advisories record a fix for october (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.