CVE-2023-33182
Nextcloud Contacts photos only sanitized if mime type is all lower case
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. The unsanitized SVG is converted to a JavaScript blob (in memory data) that the Avatar can't render. Due to this constellation the missing sanitization does not seem to be exploitable. It is recommended that the Contacts app is upgraded to 5.0.3 or 4.2.4
Timeline
ID reserved
By GitHub_M
- 13 days later
· 13 days later
Published
- 20 months later
· 20 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | None0.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 0.85% · top 42% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: None 0.0.
Weakness
Affected products
nextcloud · security-advisories
- affected >= 4.1.0, < 4.2.4
- affected >= 5.0.0, < 5.0.3
References (3)
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hxr6-cx85-gcjx (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/nextcloud/contacts/pull/3199 (opens in a new tab)x_refsource_MISCx_transferred
- https://hackerone.com/reports/1789602 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-33182)Record last updated .