Vulnerability in Python Pillow
CVE-2021-25292
An issue was discovered in Pillow before 8.1.1. The PDF parser allows a regular expression DoS (ReDoS) attack via a crafted PDF file because of a catastrophic backtracking regex.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.016 (75.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html (Release Notes, Vendor Advisory)
- security.gentoo.org/glsa/202107-33 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-25292?
- CVE-2021-25292 is a medium-severity vulnerability in Python Pillow, classified under Inefficient Regular Expression Complexity. CVSS score: 6.5/10. Published 2021-03-19.
- How severe is CVE-2021-25292?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-25292 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.