What is CVE-2021-25289?

CVE-2021-25289 is a critical-severity vulnerability in Python Pillow, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-03-19.

How severe is CVE-2021-25289?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-25289 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Python Pillow

CVE-2021-25289

An issue was discovered in Pillow before 8.1.1. TiffDecode has a heap-based buffer overflow when decoding crafted YCbCr files because of certain interpretation conflicts with LibTIFF in RGBA mode. NOTE: this issue exists because of an inco…

Vulnerability class: Buffer Overflow

EPSS: 0.023 (81.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Python Pillow
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

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-2021-25289?: CVE-2021-25289 is a critical-severity vulnerability in Python Pillow, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-03-19.
How severe is CVE-2021-25289?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-25289 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.