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.

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)

EPSS: 0.016 (73.9th percentile) — read the EPSS interpretation.

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.

Affected products

Python Pillow
N/a — versions n/a

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

Public proof-of-concept exploits

References

cve@mitre.org (x_refsource_MISC, Release Notes, Vendor Advisory)
cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)

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.