What is CVE-2022-21705?

CVE-2022-21705 is a high-severity vulnerability in Octobercms October, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.2/10. Published 2022-02-23.

How severe is CVE-2022-21705?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2022-21705 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Octobercms October

CVE-2022-21705

Octobercms is a self-hosted CMS platform based on the Laravel PHP Framework. In affected versions user input was not properly sanitized before rendering. An authenticated user with the permissions to create, modify and delete website pages can exploit this vulnerability to bypass `cms.safe_mode` / `cms.enableSafeMode` in order to execute arbitrary code. This issue only affects admin panels that rely on safe mode and restricted permissions. To exploit this vulnerability, an attacker must first have access to the backend area. The issue has been patched in Build 474 (v1.0.474) and v1.1.10. Users unable to upgrade should apply https://github.com/octobercms/library/commit/c393c5ce9ca2c5acc3ed6c9bb0dab5ffd61965fe to your installation manually.

Published 2022-02-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.086 (95.1th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.086 · newest: 0.086 · change: 0.000

Affected products

Octobercms October — versions < 1.0.474, >= 1.1.0, < 1.1.10, >= 2.0.0, < 2.1.27

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

Public proof-of-concept exploits

References

github.com/octobercms/october/security/advisories/GHSA-79jw-2f46-wv22 (Patch, Third Party Advisory, Issue Tracking)
github.com/octobercms/library/commit/c393c5ce9ca2c5acc3ed6c9bb0dab5ffd61965fe (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-21705?: CVE-2022-21705 is a high-severity vulnerability in Octobercms October, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.2/10. Published 2022-02-23.
How severe is CVE-2022-21705?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2022-21705 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.