6.1

CVE-2021-33507: plone

Modified
AliasesGHSA-35rg-466w-77h3PYSEC-2021-79PYSEC-2026-2961
Published 21-05-2021Last modified 03-08-2024

Vulnerability summary

CVE-2021-33507 is a medium (CVSS 6.1) vulnerability in plone. EPSS estimates a 0.75% chance of exploitation in the next 30 days, higher than 54.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.1, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.1/10
010
Medium · v3.1 (NVD)
EPSS score
0.75%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 21-05-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Zope Products.CMFCore before 2.5.1 and Products.PluggableAuthService before 2.6.2, as used in Plone through 5.2.4 and other products, allow Reflected XSS.

CVSS metrics

4 scores · 2 sources · 3 versions

EPSS trend

Probability

0.75%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.75% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

PyPI3 products
  • plone≤ 5.2.4 | < 5.2.5
  • products-cmfcore< 2.5.1
  • products-pluggableauthservice< 2.6.2
Plone1 product
  • plone≤ 4.3.20 | ≥ 5.0, ≤ 5.2.4
Zope1 product

3 vendors · 5 products

References

7 links