Withdrawn Advisory: October Cross-site Scripting vulnerability

published 2023-09-28 3 y ago modified 2026-09-10 1 mo ago also GHSA-2g8p-j2r6-vqpj , EUVD-2023-2393

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

A Cross-Site Scripting (XSS) vulnerability in installation of October v.3.4.16 allows an attacker to execute arbitrary web scripts via a crafted payload injected into the dbhost field.

Patch / fix

links 1

github.com/octobercms/install@ef1225b commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-09-23)

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/sromanhu/October-CMS-Reflected-XSS---Installation/blob/main/README.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /octobercms/install/commit/ef1225b5596b7c2eb5ca3aa700a23e9f8acf387b
web
github.com /sromanhu/October-CMS-Reflected-XSS---Installation/blob/main/README.md
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2023-43876
advisory
github.com /sromanhu/CVE-2023-43876-October-CMS-Reflected-XSS---Installation/issues/1
web
github.com /octobercms/install
package

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.

Summary