CVE-2021-35959
Plone has stored XSS in folder contents
CVE-2021-35959 is a medium vulnerability (CVSS 5.4) in Plone, published June 30, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.54%, the 45th percentile. Fixed in plone 5.2.5.
In Plone 5.0 through 5.2.4, Editors are vulnerable to XSS in the folder contents view, if a Contributor has created a folder with a SCRIPT tag in the description field.
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
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In Plone 5.0 through 5.2.4, Editors are vulnerable to XSS in the folder contents view, if a Contributor has created a folder with a SCRIPT tag in the description field.
- Record
CVE-2021-35959- 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-79
- Updated
- 2026-11-02
CVE List No score
In Plone 5.0 through 5.2.4, Editors are vulnerable to XSS in the folder contents view, if a Contributor has created a folder with a SCRIPT tag in the description field.
- Record
CVE-2021-35959- Updated
- 2026-11-02
EUVDEUVD-2021-0187 No score
In Plone 5.0 through 5.2.4, Editors are vulnerable to XSS in the folder contents view, if a Contributor has created a folder with a SCRIPT tag in the description field.
- Record
EUVD-2021-0187- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qfhw-fv3g-v836
Plone has stored XSS in folder contents
In Plone 5.0 through 5.2.4, Editors are vulnerable to XSS in the folder contents view, if a Contributor has created a folder with a SCRIPT tag in the description field.
- Record
GHSA-qfhw-fv3g-v836- CVSS 4.0
- 5.3 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
In Plone 5.0 through 5.2.4, Editors are vulnerable to XSS in the folder contents view, if a Contributor has created a folder with a SCRIPT tag in the description field.
- Record
CVE-2021-35959- 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
OSVGHSA-qfhw-fv3g-v836
Plone has stored XSS in folder contents
In Plone 5.0 through 5.2.4, Editors are vulnerable to XSS in the folder contents view, if a Contributor has created a folder with a SCRIPT tag in the description field.
- Record
GHSA-qfhw-fv3g-v836- CVSS 4.0
- 5.3 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVPYSEC-2021-110 No score
In Plone 5.0 through 5.2.4, Editors are vulnerable to XSS in the folder contents view, if a Contributor has created a folder with a SCRIPT tag in the description field.
- Record
PYSEC-2021-110- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
plonePyPI |
5.0 to 5.2.4 | None known |
plonePyPI |
5.0 to 5.2.4, plus listed versions 5.0.15.0.105.0.25.0.35.0.4 Show 33 moreShow less5.0.55.0.65.0.75.0.85.0.95.1.05.1.15.1.25.1.35.1.45.1.55.1.65.1.75.1a15.1a25.1b15.1b25.1b35.1b45.1rc15.1rc25.2.05.2.15.2.25.2.35.2a15.2a25.2b15.2rc15.2rc25.2rc35.2rc45.2rc5 |
None known |
plonePyPI |
5.0 up to 5.2.5, plus listed versions 5.0.15.0.105.0.25.0.35.0.4 Show 34 moreShow less5.0.55.0.65.0.75.0.85.0.95.1.05.1.15.1.25.1.35.1.45.1.55.1.65.1.75.1a15.1a25.1b15.1b25.1b35.1b45.1rc15.1rc25.2.05.2.15.2.25.2.35.2.45.2a15.2a25.2b15.2rc15.2rc25.2rc35.2rc45.2rc5 |
5.2.5 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |