CVE-2023-42458
Zope vulnerable to Stored Cross Site Scripting with SVG images
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
3.7
Zope vulnerable to Stored Cross Site Scripting with SVG images
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.
- Record
CVE-2023-42458- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-80, CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2023-2609
3.7
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.
- Record
EUVD-2023-2609- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-wm8q-9975-xh5v
3.7
Zope vulnerable to Stored Cross Site Scripting with SVG images
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.
- Record
GHSA-wm8q-9975-xh5v- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
NVD
3.7
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.
- Record
CVE-2023-42458- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79, CWE-80
- Updated
- 2026-11-02
OSV
3.7
Zope vulnerable to Stored Cross Site Scripting with SVG images
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.
- Record
CVE-2023-42458- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-79, CWE-80
- Updated
- 2026-11-02
OSVGHSA-wm8q-9975-xh5v
3.7
Zope vulnerable to Stored Cross Site Scripting with SVG images
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.
- Record
GHSA-wm8q-9975-xh5v- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVPYSEC-2026-2077
3.7
Zope vulnerable to Stored Cross Site Scripting with SVG images
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.
- Record
PYSEC-2026-2077- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
zopePyPI |
through 4.8.9 | 4.8.10 |
zopePyPI |
5.8.0 to 5.8.4 | 5.8.5 |
zopePyPI |
before 4.8.10, plus listed versions 4.04.0b14.0b104.0b24.0b3 Show 39 moreShow less4.0b44.0b54.0b64.0b74.0b84.0b94.14.1.14.1.24.1.34.24.2.14.34.44.4.14.4.24.4.34.4.44.54.5.14.5.24.5.34.5.44.5.54.64.6.14.6.24.6.34.74.84.8.14.8.24.8.34.8.44.8.54.8.64.8.74.8.84.8.9 |
4.8.10 |
zopePyPI |
5.8.0 up to 5.8.5, plus listed versions 5.85.8.15.8.25.8.35.8.4 |
5.8.5 |
zopePyPI |
before 4.8.10, 5.8.0 up to 5.8.5, plus listed versions 4.04.0b14.0b104.0b24.0b3 Show 44 moreShow less4.0b44.0b54.0b64.0b74.0b84.0b94.14.1.14.1.24.1.34.24.2.14.34.44.4.14.4.24.4.34.4.44.54.5.14.5.24.5.34.5.44.5.54.64.6.14.6.24.6.34.74.84.8.14.8.24.8.34.8.44.8.54.8.64.8.74.8.84.8.95.85.8.15.8.25.8.35.8.4 |
4.8.105.8.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-42458 is a low vulnerability (CVSS 3.7) in Zope, published September 21, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.71%, the 53rd percentile. Fixed in zope 4.8.10.
References
github.com/zopefoundation/Zope/security/advisories/GHSA-wm8q-9975-xh5v
github.com/zopefoundation/Zope/commit/26a55dbc301db417f47cafda6fe0f983b5690088
github.com/zopefoundation/Zope/commit/603b0a12881c90a072a7a65e32d47ed898ce37cb
openwall.com/lists/oss-security/2023/09/22/2
nvd.nist.gov/vuln/detail/CVE-2023-42458
github.com/advisories/GHSA-wm8q-9975-xh5v
github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42458.json
github.com/zopefoundation/Zope
pypi.org/project/zope