CVE-2023-42458
mediumpriority · track · 22EPSS 0.007 · 54 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–5.4
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (6)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- GHSA-wm8q-9975-xh5vZope vulnerable to Stored Cross Site Scripting with SVG images2023-09-21ghsa · osvUS
### Impact 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. All versions of Zope are impacted on sites that allow untrusted users to upload images. ### Patches Patches will be released in Zope 4.8.10 and 5.8.5. ### Workarounds Make sure the "Add Documents, Images, and Files" permission is only assigned to trusted roles. By default only the Manager has this permission.
- PYSEC-2026-2077Zope vulnerable to Stored Cross Site Scripting with SVG images2026-07-07vendor · osvUS
### Impact 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. All versions of Zope are impacted on sites that allow untrusted users to upload images. ### Patches Patches will be released in Zope 4.8.10 and 5.8.5. ### Workarounds Make sure the "Add Documents, Images, and Files" permission is only assigned to trusted roles. By default only the Manager has this permission.
also known as (6)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (13)
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2023/09/22/2cnnvd
- https://cxsecurity.com/cveshow/CVE-2023-42458/cnnvd
- https://github.com/zopefoundation/Zope/commit/26a55dbc301db417f47cafda6fe0f983b5690088cnnvd
- https://github.com/zopefoundation/Zope/commit/603b0a12881c90a072a7a65e32d47ed898ce37cbcnnvd
- https://github.com/zopefoundation/Zope/security/advisories/GHSA-wm8q-9975-xh5vcnnvd
- http://www.openwall.com/lists/oss-security/2023/09/22/2enisa_euvd
- https://github.com/zopefoundation/Zope/commit/26a55dbc301db417f47cafda6fe0f983b5690088enisa_euvd
- https://github.com/zopefoundation/Zope/commit/603b0a12881c90a072a7a65e32d47ed898ce37cbenisa_euvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan