CVE-2020-5298
Reflected XSS when importing CSV in OctoberCMS
In OctoberCMS (october/october composer package) versions from 1.0.319 and before 1.0.466, a user with the ability to use the import functionality of the ImportExportController behavior can be socially engineered by an attacker to upload a maliciously crafted CSV file which could result in a reflected XSS attack on the user in question Issue has been patched in Build 466 (v1.0.466).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Reflected XSS when importing CSV in OctoberCMS
In OctoberCMS (october/october composer package) versions from 1.0.319 and before 1.0.466, a user with the ability to use the import functionality of the ImportExportController behavior can be socially engineered by an attacker to upload a maliciously crafted CSV file which could result in a reflected XSS attack on the user in question Issue has been patched in Build 466 (v1.0.466).
- Record
CVE-2020-5298- CVSS 3.1
- 4.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-87
- Updated
- 2026-11-02
EUVDEUVD-2020-0491
In OctoberCMS (october/october composer package) versions from 1.0.319 and before 1.0.466, a user with the ability to use the import functionality of the ImportExportController behavior can be socially engineered by an attacker to upload a maliciously crafted CSV file which could result in a reflected XSS attack on the user in question Issue has been patched in Build 466 (v1.0.466).
- Record
EUVD-2020-0491- CVSS 3.1
- 4.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gg6x-xx78-448c
Reflected XSS when importing CSV in OctoberCMS
Impact
A user with the ability to use the import functionality of the ImportExportController behavior could be socially engineered by an attacker to upload a maliciously crafted CSV file which could result in a reflected XSS attack on the user in question
Patches
Issue has been patched in Build 466 (v1.0.466).
Workarounds
Apply https://github.com/octobercms/october/commit/cd0b6a791f995d86071a024464c1702efc50f46c to your installation manually if unable to upgrade to Build 466.
References
Reported by Sivanesh Ashok
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
Threat assessment:
<img width="1100" alt="Screen Shot 2020-03-31 at 2 01 52 PM" src="https://user-images.githubusercontent.com/7253840/78070158-8f7ef580-7358-11ea-950c-226533f6a0a3.png">
- Record
GHSA-gg6x-xx78-448c- CVSS 3.1
- 4.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79, CWE-87
- Updated
- 2026-11-02
NVD
In OctoberCMS (october/october composer package) versions from 1.0.319 and before 1.0.466, a user with the ability to use the import functionality of the ImportExportController behavior can be socially engineered by an attacker to upload a maliciously crafted CSV file which could result in a reflected XSS attack on the user in question Issue has been patched in Build 466 (v1.0.466).
- Record
CVE-2020-5298- CVSS 3.1
- 4.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N - CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:N/I:P/A:N - Weakness
- CWE-87, CWE-79
- Updated
- 2026-11-02
OSV
In OctoberCMS (october/october composer package) versions from 1.0.319 and before 1.0.466, a user with the ability to use the import functionality of the ImportExportController behavior can be socially engineered by an attacker to upload a maliciously crafted CSV file which could result in a reflected XSS attack on the user in question Issue has been patched in Build 466 (v1.0.466).
- Record
CVE-2020-5298- CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-gg6x-xx78-448c
Reflected XSS when importing CSV in OctoberCMS
Impact
A user with the ability to use the import functionality of the ImportExportController behavior could be socially engineered by an attacker to upload a maliciously crafted CSV file which could result in a reflected XSS attack on the user in question
Patches
Issue has been patched in Build 466 (v1.0.466).
Workarounds
Apply https://github.com/octobercms/october/commit/cd0b6a791f995d86071a024464c1702efc50f46c to your installation manually if unable to upgrade to Build 466.
References
Reported by Sivanesh Ashok
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
Threat assessment:
<img width="1100" alt="Screen Shot 2020-03-31 at 2 01 52 PM" src="https://user-images.githubusercontent.com/7253840/78070158-8f7ef580-7358-11ea-950c-226533f6a0a3.png">
- Record
GHSA-gg6x-xx78-448c- CVSS 3.1
- 4.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79, CWE-87
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
october/backendPackagist |
1.0.319 up to 1.0.466 | 1.0.466 |
october/backendPackagist |
1.0.319 up to 1.0.466, plus listed versions v1.0.319v1.0.320v1.0.321v1.0.322v1.0.323 Show 45 moreShow lessv1.0.324v1.0.325v1.0.326v1.0.327v1.0.328v1.0.329v1.0.330v1.0.331v1.0.332v1.0.333v1.0.334v1.0.335v1.0.336v1.0.337v1.0.338v1.0.339v1.0.340v1.0.341v1.0.342v1.0.343v1.0.344v1.0.345v1.0.346v1.0.347v1.0.348v1.0.349v1.0.350v1.0.351v1.0.352v1.0.353v1.0.354v1.0.355v1.0.356v1.0.357v1.0.358v1.0.359v1.0.360v1.0.361v1.0.362v1.0.363v1.0.364v1.0.365v1.0.366v1.0.367v1.0.368 |
1.0.466 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-5298 is a medium vulnerability (CVSS 4.0) in Octobercms October, published June 3, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.91%, the 60th percentile. Fixed in october/backend 1.0.466.
References
github.com/octobercms/october/security/advisories/GHSA-gg6x-xx78-448c
packetstormsecurity.com/files/158730/October-CMS-Build-465-XSS-File-Read-File-Deletion-CSV-Injection.html
seclists.org/fulldisclosure/2020/Aug/2
nvd.nist.gov/vuln/detail/CVE-2020-5298
Left out here: 97 versions. The JSON record has them.