SSRF in Plone
CVE-2021-33926
An issue in Plone CMS v. 5.2.4, 5.2.3, 5.2.2, 5.2.1, 5.2.0, 5.1rc2, 5.1rc1, 5.1b4, 5.1b3, 5.1b2, 5.1a2, 5.1a1, 5.1.7, 5.1.6, 5.1.5, 5.1.4, 5.1.2, 5.1.1 5.1, 5.0rc3, 5.0rc2, 5.0rc1, 5.0.9, 5.0.8, 5.0.7, 5.0.6, 5.0.5, 5.0.4, 5.0.3, 5.0.2, 5.0.10, 5.0.1, 5.0, 4.3.9, 4.3.8, 4.3.7, 4.3.6, 4.3.5, 4.3.4, 4.3.3, 4.3.20, 4 allows attacker to access sensitive information via the RSS feed protlet.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000
Affected products
- Plone — versions 4.3, 4.3.1, 4.3.2
Weakness classification (CWE)
References
- plone.org/security/hotfix/20210518 (Release Notes)
- github.com/s-kustm/Subodh/blob/master/Plone 5.2.4 Vulnerable to bilend SSRF.pdf (Exploit, Third Party Advisory)
- plone.org/security/hotfix/20210518/blind-ssrf-via-feedparser-accessing-an-inter… (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-33926?
- CVE-2021-33926 is a high-severity vulnerability in Plone, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.8/10. Published 2023-02-17.
- How severe is CVE-2021-33926?
- High severity. CVSS v3 base score is 8.8 out of 10.