Skip to content
Fencer Vulns
medium 4.0

CVE-2020-15248 json

Privilege escalation by backend users assigned to the default "Publisher" system role

published 2020-11-23 5 y ago modified 2026-07-08 4 mo ago also GHSA-rfjc-xrmf-5vvw , EUVD-2020-1471

cvss
4.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October CMS from version 1.0.319 and before version 1.0.470, backend users with the default "Publisher" system role have access to create & manage users where they can choose which role the new user has. This means that a user with "Publisher" access has the ability to escalate their access to "Developer" access. Issue has been patched in Build 470 (v1.0.470) & v1.1.1.

Patch / fix

  • packagist october/backend 1.0.470
  • octobercms october 1.0.469

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
NVD 3.1 4.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 4.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
packagist october/backend
>=1.0.319, <1.0.470
1.0.470

Affected products

  • octobercms october

Classification

Weakness
  • CWE-863 Incorrect Authorization
  • CWE-269 Improper Privilege Management

References

Sources

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.