PT-2021-20168 · Plone · Plone

David Miller + 1 · Published 2021-05-21 · Updated 2021-06-15 · CVE-2021-33510

Positive Technologies (AI Summary)

CVSS v4.0

5.3

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Plone versions through 5.2.4

Description The issue allows remote authenticated managers to conduct Server-Side Request Forgery (SSRF) attacks via an event ical URL. This enables them to read one line of a file.

Recommendations For versions through 5.2.4, update to a version that contains a fix for this issue to prevent SSRF attacks. As a temporary workaround, consider restricting access to the event ical URL to minimize the risk of exploitation.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2021-33510

GHSA-4MG4-WVMX-5332

PYSEC-2021-82

Affected Products

Plone

References · 12

• https://osv.dev/vulnerability/PYSEC-2021-82 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-33510 · Security Note
• https://plone.org/security/hotfix/20210518/server-side-request-forgery-via-event-ical-url · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-33510 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-4mg4-wvmx-5332 · Vendor Advisory
• https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2021-82.yaml · Note
• https://github.com/plone/Plone · Note
• https://github.com/advisories/GHSA-4mg4-wvmx-5332 · Note
• https://t.me/cvenotify/14893 · Telegram Post
• http://openwall.com/lists/oss-security/2021/05/22/1 · Note
• https://t.me/cvenotify/14851 · Telegram Post
• https://t.me/cvenotify/14859 · Telegram Post