CVE-2020-11026
Specially crafted filenames in WordPress leading to XSS
In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
8.7
Specially crafted filenames in WordPress leading to XSS
In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).
- Record
CVE-2020-11026- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-707
- Updated
- 2026-11-02
EUVDEUVD-2020-3411
8.7
In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).
- Record
EUVD-2020-3411- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-03
NVD
8.7
In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).
- Record
CVE-2020-11026- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/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-707, CWE-79
- Updated
- 2026-11-02
OSV
5.4
In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).
- Record
CVE-2020-11026- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-11026
5.4
In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).
- Record
DEBIAN-CVE-2020-11026- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-11026
8.7
In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).
- Record
UBUNTU-CVE-2020-11026- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVBIT-wordpress-2020-11026 No score
Specially crafted filenames in WordPress leading to XSS
In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).
- Record
BIT-wordpress-2020-11026- Updated
- 2026-11-02
OSVBIT-wordpress-multisite-2020-11026 No score
Specially crafted filenames in WordPress leading to XSS
In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).
- Record
BIT-wordpress-multisite-2020-11026- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
wordpressBitnami |
3.7.0 up to 3.7.33, 3.8.0 up to 3.8.33, 3.9.0 up to 3.9.31, 4.0.0 up to 4.0.30, 4.1.0 up to 4.1.30, 4.2.0 up to 4.2.27, 4.3.0 up to 4.3.23, 4.4.0 up to 4.4.22, 4.5.0 up to 4.5.21, 4.6.0 up to 4.6.18, 4.7.0 up to 4.7.17, 4.8.0 up to 4.8.13, 4.9.0 up to 4.9.14, 5.0.0 up to 5.0.9, 5.1.0 up to 5.1.5, 5.2.0 up to 5.2.6, 5.3.0 up to 5.3.3, 5.4.0 up to 5.4.1 | 3.7.333.8.333.9.314.0.304.1.304.2.274.3.234.4.224.5.214.6.184.7.174.8.134.9.145.0.95.1.55.2.65.3.35.4.1 |
wordpress-multisiteBitnami |
3.7.0 up to 3.7.33, 3.8.0 up to 3.8.33, 3.9.0 up to 3.9.31, 4.0.0 up to 4.0.30, 4.1.0 up to 4.1.30, 4.2.0 up to 4.2.27, 4.3.0 up to 4.3.23, 4.4.0 up to 4.4.22, 4.5.0 up to 4.5.21, 4.6.0 up to 4.6.18, 4.7.0 up to 4.7.17, 4.8.0 up to 4.8.13, 4.9.0 up to 4.9.14, 5.0.0 up to 5.0.9, 5.1.0 up to 5.1.5, 5.2.0 up to 5.2.6, 5.3.0 up to 5.3.3, 5.4.0 up to 5.4.1 | 3.7.333.8.333.9.314.0.304.1.304.2.274.3.234.4.224.5.214.6.184.7.174.8.134.9.145.0.95.1.55.2.65.3.35.4.1 |
wordpressDebian:12 |
before 5.4.1+dfsg1-1 | 5.4.1+dfsg1-1 |
wordpressDebian:13 |
before 5.4.1+dfsg1-1 | 5.4.1+dfsg1-1 |
wordpressDebian:14 |
before 5.4.1+dfsg1-1 | 5.4.1+dfsg1-1 |
wordpressDebian:8 From an advisory covering 4 CVEs |
before 4.1.30+dfsg-0+deb8u1, plus listed versions 4.1+dfsg-14.1+dfsg-1+deb8u14.1+dfsg-1+deb8u104.1+dfsg-1+deb8u114.1+dfsg-1+deb8u12 Show 20 moreShow less4.1+dfsg-1+deb8u134.1+dfsg-1+deb8u144.1+dfsg-1+deb8u154.1+dfsg-1+deb8u164.1+dfsg-1+deb8u174.1+dfsg-1+deb8u184.1+dfsg-1+deb8u24.1+dfsg-1+deb8u34.1+dfsg-1+deb8u44.1+dfsg-1+deb8u54.1+dfsg-1+deb8u64.1+dfsg-1+deb8u74.1+dfsg-1+deb8u84.1+dfsg-1+deb8u94.1.1+dfsg-14.1.25+dfsg-1+deb8u14.1.26+dfsg-1+deb8u14.1.27+dfsg-0+deb8u14.1.28+dfsg-0+deb8u14.1.29+dfsg-0+deb8u1 |
4.1.30+dfsg-0+deb8u1 |
wordpressDebian:9 From an advisory covering 5 CVEs |
before 4.7.5+dfsg-2+deb9u6, plus listed versions 4.7.5+dfsg-24.7.5+dfsg-2+deb9u14.7.5+dfsg-2+deb9u1~bpo8+14.7.5+dfsg-2+deb9u24.7.5+dfsg-2+deb9u2~bpo8+14.7.5+dfsg-2+deb9u34.7.5+dfsg-2+deb9u44.7.5+dfsg-2+deb9u5 |
4.7.5+dfsg-2+deb9u6 |
wordpressDebian:10 From an advisory covering 5 CVEs |
before 5.0.4+dfsg1-1+deb10u2, plus listed versions 5.0.4+dfsg1-15.0.4+dfsg1-1+deb10u1 |
5.0.4+dfsg1-1+deb10u2 |
wordpressUbuntu:16.04:LTS |
All versions, plus listed versions 4.3+dfsg-14.3.1+dfsg-14.4+dfsg-14.4.1+dfsg-14.4.2+dfsg-14.4.2+dfsg-1ubuntu1 |
None known |
wordpressUbuntu:18.04:LTS |
All versions, plus listed versions 4.8.2+dfsg-24.8.3+dfsg-14.9.1+dfsg-14.9.2+dfsg-14.9.4+dfsg-14.9.5+dfsg1-1 |
None known |
Show 6 moreShow less
| Package | Affected | Fixed |
|---|---|---|
wordpressUbuntu:20.04:LTS |
All versions, plus listed versions 5.2.2+dfsg1-15.2.4+dfsg1-15.3.2+dfsg1-15.3.2+dfsg1-1ubuntu1 |
None known |
wordpressUbuntu:22.04:LTS |
All versions, plus listed versions 5.7.1+dfsg1-2ubuntu15.8.1+dfsg1-2ubuntu15.8.2+dfsg1-1ubuntu15.8.3+dfsg1-1ubuntu15.8.3+dfsg1-1ubuntu1.1 |
None known |
wordpressUbuntu:24.04:LTS |
All versions, plus listed versions 6.2+dfsg1-1ubuntu16.4.3+dfsg1-1ubuntu1 |
None known |
wordpressUbuntu:25.10 |
All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu1 |
None known |
wordpressUbuntu:26.10 |
All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu2 |
None known |
wordpressUbuntu:26.04:LTS |
All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu16.7.2+dfsg1-1.1ubuntu2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases, products | EUVD | |
| first indexed | CVE List, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-11026 is a high vulnerability (CVSS 8.7) in Wordpress, published April 30, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.09%, the 81st percentile. Fixed in wordpress 3.7.33.
References
wordpress.org/support/wordpress-version/version-5-4-1
github.com/WordPress/wordpress-develop/security/advisories/GHSA-3gw2-4656-pfr2
debian.org/security/2020/dsa-4677
lists.debian.org/debian-lts-announce/2020/05/msg00011.html
nvd.nist.gov/vuln/detail/CVE-2020-11026
security-tracker.debian.org/tracker/CVE-2020-11026
ubuntu.com/security/CVE-2020-11026
cve.org/CVERecord?id=CVE-2020-11026