CVE-2021-26034
[20210503] - Core - CSRF in data download endpoints
An issue was discovered in Joomla! 3.0.0 through 3.9.26. A missing token check causes a CSRF vulnerability in data download endpoints in com_banners and com_sysinfo.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Joomla! 3.0.0 through 3.9.26. A missing token check causes a CSRF vulnerability in data download endpoints in com_banners and com_sysinfo.
- Record
CVE-2021-26034- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-352
- Updated
- 2026-11-02
CVE List No score
[20210503] - Core - CSRF in data download endpoints
An issue was discovered in Joomla! 3.0.0 through 3.9.26. A missing token check causes a CSRF vulnerability in data download endpoints in com_banners and com_sysinfo.
- Record
CVE-2021-26034- Updated
- 2026-11-02
EUVDEUVD-2021-12857 No score
An issue was discovered in Joomla! 3.0.0 through 3.9.26. A missing token check causes a CSRF vulnerability in data download endpoints in com_banners and com_sysinfo.
- Record
EUVD-2021-12857- Updated
- 2026-11-02
GitHub AdvisoriesGHSA-v774-fr36-5478 No score
An issue was discovered in Joomla! 3.0.0 through 3.9.26. A missing token check causes a CSRF...
An issue was discovered in Joomla! 3.0.0 through 3.9.26. A missing token check causes a CSRF vulnerability in data download endpoints in com_banners and com_sysinfo.
- Record
GHSA-v774-fr36-5478- Weakness
- CWE-352
- Updated
- 2026-11-02
OSV
An issue was discovered in Joomla! 3.0.0 through 3.9.26. A missing token check causes a CSRF vulnerability in data download endpoints in com_banners and com_sysinfo.
- Record
CVE-2021-26034- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVBIT-joomla-2021-26034 No score
[20210503] - Core - CSRF in data download endpoints
An issue was discovered in Joomla! 3.0.0 through 3.9.26. A missing token check causes a CSRF vulnerability in data download endpoints in com_banners and com_sysinfo.
- Record
BIT-joomla-2021-26034- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
joomlaBitnami |
3.0.0 to 3.9.26 | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-26034 is a medium vulnerability (CVSS 6.5) in Joomla Joomla\!, published May 26, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.50%, the 42nd percentile. No source names a fixed version.