Search for vulnerabilities
Vulnerability details: VCID-x9n2-jz5u-n7b5
Vulnerability ID VCID-x9n2-jz5u-n7b5
Aliases BIT-pillow-2021-25292
CVE-2021-25292
GHSA-9hx2-hgq2-2g4f
PYSEC-2021-38
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (5)
CWE-400 Uncontrolled Resource Consumption
CWE-20 Improper Input Validation
CWE-1333 Inefficient Regular Expression Complexity
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-25292.json
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00167 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
epss 0.00167 https://api.first.org/data/v1/epss?cve=CVE-2021-25292
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 6.5 https://github.com/advisories/GHSA-9hx2-hgq2-2g4f
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-9hx2-hgq2-2g4f
generic_textual MODERATE https://github.com/advisories/GHSA-9hx2-hgq2-2g4f
cvssv3.1 6.5 https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-38.yaml
generic_textual MODERATE https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-38.yaml
cvssv3.1 6.5 https://github.com/python-pillow/Pillow
generic_textual MODERATE https://github.com/python-pillow/Pillow
cvssv3.1 6.5 https://github.com/python-pillow/Pillow/commit/3bce145966374dd39ce58a6fc0083f8d1890719c
generic_textual MODERATE https://github.com/python-pillow/Pillow/commit/3bce145966374dd39ce58a6fc0083f8d1890719c
cvssv3.1 6.5 https://github.com/python-pillow/Pillow/commit/521dab94c7ab72b037bd9a83e9663401e0fd2cee
generic_textual MODERATE https://github.com/python-pillow/Pillow/commit/521dab94c7ab72b037bd9a83e9663401e0fd2cee
cvssv3.1 6.5 https://github.com/python-pillow/Pillow/commit/6207b44ab1ff4a91d8ddc7579619876d0bb191a4
generic_textual MODERATE https://github.com/python-pillow/Pillow/commit/6207b44ab1ff4a91d8ddc7579619876d0bb191a4
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-25292
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-25292
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-25292
cvssv3.1 6.5 https://pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html
generic_textual MODERATE https://pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html
archlinux Medium https://security.archlinux.org/AVG-1635
cvssv3.1 6.5 https://security.gentoo.org/glsa/202107-33
generic_textual MODERATE https://security.gentoo.org/glsa/202107-33
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-25292.json
https://api.first.org/data/v1/epss?cve=CVE-2021-25292
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-25292
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/advisories/GHSA-9hx2-hgq2-2g4f
https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-38.yaml
https://github.com/python-pillow/Pillow
https://github.com/python-pillow/Pillow/commit/3bce145966374dd39ce58a6fc0083f8d1890719c
https://github.com/python-pillow/Pillow/commit/521dab94c7ab72b037bd9a83e9663401e0fd2cee
https://github.com/python-pillow/Pillow/commit/6207b44ab1ff4a91d8ddc7579619876d0bb191a4
https://nvd.nist.gov/vuln/detail/CVE-2021-25292
https://pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html
https://security.gentoo.org/glsa/202107-33
1934699 https://bugzilla.redhat.com/show_bug.cgi?id=1934699
AVG-1635 https://security.archlinux.org/AVG-1635
cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*
RHSA-2021:3917 https://access.redhat.com/errata/RHSA-2021:3917
RHSA-2021:4149 https://access.redhat.com/errata/RHSA-2021:4149
USN-4763-1 https://usn.ubuntu.com/4763-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-25292.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/advisories/GHSA-9hx2-hgq2-2g4f
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-38.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/python-pillow/Pillow
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/python-pillow/Pillow/commit/3bce145966374dd39ce58a6fc0083f8d1890719c
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/python-pillow/Pillow/commit/521dab94c7ab72b037bd9a83e9663401e0fd2cee
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/python-pillow/Pillow/commit/6207b44ab1ff4a91d8ddc7579619876d0bb191a4
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-25292
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-25292
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://security.gentoo.org/glsa/202107-33
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.37842
EPSS Score 0.00162
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:11:21.759624+00:00 Pypa Importer Import https://github.com/pypa/advisory-database/blob/main/vulns/pillow/PYSEC-2021-38.yaml 37.0.0