HOMEVULNERABILITIESCVE-2020-15249
MEDIUM

CVE-2020-15249

CWE-79Published: November 23, 2020· Updated: Jun 17, 2026

5.4
CVSS v3.1

Official Description

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 1.0.469, backend users with access to upload files were permitted to upload SVG files without any sanitization applied to the uploaded files. Since SVG files support being parsed as HTML by browsers, this means that they could theoretically upload Javascript that would be executed on a path under the website's domain (i.e. /storage/app/media/evil.svg), but they would have to convince their target to visit that location directly in the target's browser as the backend does not display SVGs inline anywhere, SVGs are only displayed as image resources in the backend and are thus unable to be executed. Issue has been patched in Build 469 (v1.0.469) & v1.1.0.

NVD Source

Technical Analysis

CVE-2020-15249 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionRequired
ScopeChanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected Vendors & Products

octobercms1 product(s)
october
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4
PATCHhttps://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4
ADVISORYhttps://github.com/octobercms/october/security/advisories/GHSA-fx3v-553x-3c4q
ADVISORYhttps://github.com/octobercms/october/security/advisories/GHSA-fx3v-553x-3c4q

All References (4)

→
https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4Patch · Third Party Advisory
→
https://github.com/octobercms/october/security/advisories/GHSA-fx3v-553x-3c4qThird Party Advisory
→
https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4Patch · Third Party Advisory
→
https://github.com/octobercms/october/security/advisories/GHSA-fx3v-553x-3c4qThird Party Advisory

Quick Facts

CVE IDCVE-2020-15249
CVSS Score5.4 / 10
SeverityMEDIUM
WeaknessCWE-79
CISA KEVNo
Affected1 vendor(s)
PublishedNov 23, 2020

Related CVEs (CWE-79)

CVE-2025-49410
10.0
CVE-2024-6886
10.0
CVE-2023-0776
10.0
CVE-2021-32671
10.0
CVE-2011-3046
10.0
CVE-2026-50551
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-15249 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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