CVE-2021-33508
Cross-site scripting in Plone
Plone through 5.2.4 allows XSS via a full name that is mishandled during rendering of the ownership tab of a content item.
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
Plone through 5.2.4 allows XSS via a full name that is mishandled during rendering of the ownership tab of a content item.
- Record
CVE-2021-33508- 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
Plone through 5.2.4 allows XSS via a full name that is mishandled during rendering of the ownership tab of a content item.
- Record
CVE-2021-33508- Updated
- 2026-11-02
EUVDEUVD-2021-0190 No score
Plone through 5.2.4 allows XSS via a full name that is mishandled during rendering of the ownership tab of a content item.
- Record
EUVD-2021-0190- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rmpv-rcp6-v8wc
Cross-site scripting in Plone
Plone through 5.2.4 allows XSS via a full name that is mishandled during rendering of the ownership tab of a content item.
- Record
GHSA-rmpv-rcp6-v8wc- CVSS 4.0
- 5.1 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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 - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
Plone through 5.2.4 allows XSS via a full name that is mishandled during rendering of the ownership tab of a content item.
- Record
CVE-2021-33508- 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-rmpv-rcp6-v8wc
Cross-site scripting in Plone
Plone through 5.2.4 allows XSS via a full name that is mishandled during rendering of the ownership tab of a content item.
- Record
GHSA-rmpv-rcp6-v8wc- CVSS 4.0
- 5.1 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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 - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVPYSEC-2021-80 No score
Plone through 5.2.4 allows XSS via a full name that is mishandled during rendering of the ownership tab of a content item.
- Record
PYSEC-2021-80- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
plonePyPI |
through 5.2.4 | None known |
plonePyPI |
through 5.2.4, plus listed versions 3.23.2.13.2.23.2.33.2a1 Show 45 moreShow less3.2rc13.33.3.13.3.23.3.33.3.43.3.53.3.63.3b13.3rc13.3rc23.3rc33.3rc43.3rc54.04.0.14.0.104.0.24.0.34.0.44.0.54.0.64.0.74.0.84.0.94.0a14.0a24.0a34.0a44.0a54.0b14.0b24.0b34.0b44.0b54.0rc14.14.1.14.1.24.1.34.1.44.1.54.1.64.1a14.1a2 |
None known |
plonePyPI |
before 5.2.5, plus listed versions 3.23.2.13.2.23.2.33.2a1 Show 45 moreShow less3.2rc13.33.3.13.3.23.3.33.3.43.3.53.3.63.3b13.3rc13.3rc23.3rc33.3rc43.3rc54.04.0.14.0.104.0.24.0.34.0.44.0.54.0.64.0.74.0.84.0.94.0a14.0a24.0a34.0a44.0a54.0b14.0b24.0b34.0b44.0b54.0rc14.14.1.14.1.24.1.34.1.44.1.54.1.64.1a14.1a2 |
5.2.5 |
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-2021-33508 is a medium vulnerability (CVSS 5.4) in Plone, published May 21, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.63%, the 50th percentile. Fixed in plone 5.2.5.
References
Left out here: 189 versions. The JSON record has them.