THREATPORT/VULNERABILITY/CVE-2021-34552
CRITICAL SEVERITY

CVE-2021-34552

Pillow vulnerability

CVSS
9.8
EPSS
3.2%
EPSS pct
87th
Exploited
No known
Pillow through 8.2.0 and PIL (aka Python Imaging Library) through 1.1.7 allow an attacker to pass controlled parameters directly into a convert function to trigger a buffer overflow in Convert.c.
Affected vendor
Python
Affected product
Pillow
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-120 — Classic Buffer Overflow
Published
2021-07-13

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2021-34552

  • Confirm whether Python Pillow is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-34552.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-34552

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