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Vulnerability details: VCID-gezp-xc9s-6fhd
Vulnerability ID VCID-gezp-xc9s-6fhd
Aliases BIT-pillow-2021-28678
CVE-2021-28678
GHSA-hjfx-8p6c-g7gx
PYSEC-2021-94
Summary An issue was discovered in Pillow before 8.2.0. For BLP data, BlpImagePlugin did not properly check that reads (after jumping to file offsets) returned data. This could lead to a DoS where the decoder could be run a large number of times on empty data.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-345 Insufficient Verification of Data Authenticity
CWE-20 Improper Input Validation
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-2021-28678.json
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2021-28678
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 5.5 https://github.com/advisories/GHSA-hjfx-8p6c-g7gx
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-hjfx-8p6c-g7gx
generic_textual MODERATE https://github.com/advisories/GHSA-hjfx-8p6c-g7gx
cvssv3.1 5.5 https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-94.yaml
generic_textual MODERATE https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-94.yaml
cvssv3.1 5.5 https://github.com/python-pillow/Pillow
generic_textual MODERATE https://github.com/python-pillow/Pillow
cvssv3.1 5.5 https://github.com/python-pillow/Pillow/pull/5377
generic_textual MODERATE https://github.com/python-pillow/Pillow/pull/5377
cvssv3.1 5.5 https://github.com/python-pillow/Pillow/pull/5377/commits/496245aa4365d0827390bd0b6fbd11287453b3a1
generic_textual MODERATE https://github.com/python-pillow/Pillow/pull/5377/commits/496245aa4365d0827390bd0b6fbd11287453b3a1
cvssv3.1 5.5 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL
generic_textual MODERATE https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-28678
cvssv3.1 5.5 https://nvd.nist.gov/vuln/detail/CVE-2021-28678
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-28678
cvssv3.1 5.5 https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28678-fix-blp-dos
generic_textual MODERATE https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28678-fix-blp-dos
cvssv3.1 5.5 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-2021-28678.json
https://api.first.org/data/v1/epss?cve=CVE-2021-28678
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28678
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/advisories/GHSA-hjfx-8p6c-g7gx
https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-94.yaml
https://github.com/python-pillow/Pillow
https://github.com/python-pillow/Pillow/pull/5377
https://github.com/python-pillow/Pillow/pull/5377/commits/496245aa4365d0827390bd0b6fbd11287453b3a1
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
https://nvd.nist.gov/vuln/detail/CVE-2021-28678
https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28678-fix-blp-dos
https://security.gentoo.org/glsa/202107-33
1958263 https://bugzilla.redhat.com/show_bug.cgi?id=1958263
989062 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989062
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:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
RHSA-2021:4149 https://access.redhat.com/errata/RHSA-2021:4149
USN-4963-1 https://usn.ubuntu.com/4963-1/
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-2021-28678.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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/advisories/GHSA-hjfx-8p6c-g7gx
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:L/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-2021-94.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:L/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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/python-pillow/Pillow/pull/5377
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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/python-pillow/Pillow/pull/5377/commits/496245aa4365d0827390bd0b6fbd11287453b3a1
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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL
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-2021-28678
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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-28678
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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28678-fix-blp-dos
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:L/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 0.25528
EPSS Score 0.00084
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:16:23.366992+00:00 Pypa Importer Import https://github.com/pypa/advisory-database/blob/main/vulns/pillow/PYSEC-2021-94.yaml 37.0.0