Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-fewb-jdcf-1bfw
Vulnerability ID VCID-fewb-jdcf-1bfw
Aliases CVE-2023-42458
GHSA-wm8q-9975-xh5v
Summary Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) Zope is an open-source web application server. Prior to versions 4.8.10 and 5.8.5, there is a stored cross site scripting vulnerability for SVG images. Note that an image tag with an SVG image as source is never vulnerable, even when the SVG image contains malicious code. To exploit the vulnerability, an attacker would first need to upload an image, and then trick a user into following a specially crafted link. Patches are available in Zope 4.8.10 and 5.8.5. As a workaround, make sure the "Add Documents, Images, and Files" permission is only assigned to trusted roles. By default, only the Manager has this permission.
Status Published
Exploitability 0.5
Weighted Severity 3.3
Risk 1.6
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
System Score Found at
epss 0.00321 https://api.first.org/data/v1/epss?cve=CVE-2023-42458
cvssv3.1_qr LOW https://github.com/advisories/GHSA-wm8q-9975-xh5v
cvssv3.1 3.7 https://github.com/zopefoundation/Zope
generic_textual LOW https://github.com/zopefoundation/Zope
cvssv3.1 3.7 https://github.com/zopefoundation/Zope/commit/26a55dbc301db417f47cafda6fe0f983b5690088
generic_textual LOW https://github.com/zopefoundation/Zope/commit/26a55dbc301db417f47cafda6fe0f983b5690088
ssvc Track https://github.com/zopefoundation/Zope/commit/26a55dbc301db417f47cafda6fe0f983b5690088
cvssv3.1 3.7 https://github.com/zopefoundation/Zope/commit/603b0a12881c90a072a7a65e32d47ed898ce37cb
generic_textual LOW https://github.com/zopefoundation/Zope/commit/603b0a12881c90a072a7a65e32d47ed898ce37cb
ssvc Track https://github.com/zopefoundation/Zope/commit/603b0a12881c90a072a7a65e32d47ed898ce37cb
cvssv3.1 3.7 https://github.com/zopefoundation/Zope/security/advisories/GHSA-wm8q-9975-xh5v
cvssv3.1_qr LOW https://github.com/zopefoundation/Zope/security/advisories/GHSA-wm8q-9975-xh5v
generic_textual LOW https://github.com/zopefoundation/Zope/security/advisories/GHSA-wm8q-9975-xh5v
ssvc Track https://github.com/zopefoundation/Zope/security/advisories/GHSA-wm8q-9975-xh5v
cvssv3.1 3.7 https://nvd.nist.gov/vuln/detail/CVE-2023-42458
generic_textual LOW https://nvd.nist.gov/vuln/detail/CVE-2023-42458
cvssv3.1 3.7 http://www.openwall.com/lists/oss-security/2023/09/22/2
generic_textual LOW http://www.openwall.com/lists/oss-security/2023/09/22/2
ssvc Track http://www.openwall.com/lists/oss-security/2023/09/22/2
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2023-42458
https://github.com/zopefoundation/Zope
https://github.com/zopefoundation/Zope/commit/26a55dbc301db417f47cafda6fe0f983b5690088
https://github.com/zopefoundation/Zope/commit/603b0a12881c90a072a7a65e32d47ed898ce37cb
https://nvd.nist.gov/vuln/detail/CVE-2023-42458
http://www.openwall.com/lists/oss-security/2023/09/22/2
GHSA-wm8q-9975-xh5v https://github.com/advisories/GHSA-wm8q-9975-xh5v
GHSA-wm8q-9975-xh5v https://github.com/zopefoundation/Zope/security/advisories/GHSA-wm8q-9975-xh5v
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/zopefoundation/Zope
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/zopefoundation/Zope/commit/26a55dbc301db417f47cafda6fe0f983b5690088
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-09-24T14:48:49Z/ Found at https://github.com/zopefoundation/Zope/commit/26a55dbc301db417f47cafda6fe0f983b5690088
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/zopefoundation/Zope/commit/603b0a12881c90a072a7a65e32d47ed898ce37cb
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-09-24T14:48:49Z/ Found at https://github.com/zopefoundation/Zope/commit/603b0a12881c90a072a7a65e32d47ed898ce37cb
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/zopefoundation/Zope/security/advisories/GHSA-wm8q-9975-xh5v
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-09-24T14:48:49Z/ Found at https://github.com/zopefoundation/Zope/security/advisories/GHSA-wm8q-9975-xh5v
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2023-42458
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at http://www.openwall.com/lists/oss-security/2023/09/22/2
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-09-24T14:48:49Z/ Found at http://www.openwall.com/lists/oss-security/2023/09/22/2
Exploit Prediction Scoring System (EPSS)
Percentile 0.55349
EPSS Score 0.00321
Published At May 30, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-30T21:01:59.354647+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/zope/CVE-2023-42458.yml 38.6.0