XSS in Zope
CVE-2023-42458
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (51.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.001
Affected products
- Zope
- Zopefoundation Zope — versions < 4.8.10, >= 5.0.0, < 5.8.5
Weakness classification (CWE)
References
- github.com/zopefoundation/Zope/security/advisories/GHSA-wm8q-9975-xh5v (Third Party Advisory)
- github.com/zopefoundation/Zope/commit/26a55dbc301db417f47cafda6fe0f983b5690088 (Patch)
- github.com/zopefoundation/Zope/commit/603b0a12881c90a072a7a65e32d47ed898ce37cb (Patch)
- www.openwall.com/lists/oss-security/2023/09/22/2 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-42458?
- CVE-2023-42458 is a low-severity vulnerability in Zope, classified under Cross-site Scripting. CVSS score: 3.7/10. Published 2023-09-21.
- How severe is CVE-2023-42458?
- Low severity. CVSS v3 base score is 3.7 out of 10.