CVE-2017-18635
An XSS vulnerability was discovered in noVNC before 0.6.2 in which the remote VNC server could inject arbitrary HTML into the noVNC web page via the messages propagated to the status field, such as the VNC server name.
Does this matter?
Lower severity and a low EPSS score (4.79%). Track it; it rarely justifies an emergency change on its own.
Description
An XSS vulnerability was discovered in noVNC before 0.6.2 in which the remote VNC server could inject arbitrary HTML into the noVNC web page via the messages propagated to the status field, such as the VNC server name.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 4.79% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- novnc/novnc · debian/debian linux · canonical/ubuntu linux · redhat/openstack
- Source
- cve@mitre.org
EPSS 4.8% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://access.redhat.com/errata/RHSA-2020:0754Third Party Advisory
- https://bugs.launchpad.net/horizon/+bug/1656435Issue Tracking, Third Party Advisory
- https://github.com/ShielderSec/cve-2017-18635Third Party Advisory
- https://github.com/novnc/noVNC/commit/6048299a138e078aed210f163111698c8c526a13#diff-286f7dc7b881e942e97cd50c10898f03L534Patch, Third Party Advisory
- https://github.com/novnc/noVNC/issues/748Patch, Third Party Advisory
- https://github.com/novnc/noVNC/releases/tag/v0.6.2Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00004.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00024.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4522-1/Third Party Advisory
- https://www.shielder.it/blog/exploiting-an-old-novnc-xss-cve-2017-18635-in-openstack/Exploit, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0754Third Party Advisory
- https://bugs.launchpad.net/horizon/+bug/1656435Issue Tracking, Third Party Advisory
- https://github.com/ShielderSec/cve-2017-18635Third Party Advisory
- https://github.com/novnc/noVNC/commit/6048299a138e078aed210f163111698c8c526a13#diff-286f7dc7b881e942e97cd50c10898f03L534Patch, Third Party Advisory
- https://github.com/novnc/noVNC/issues/748Patch, Third Party Advisory
- https://github.com/novnc/noVNC/releases/tag/v0.6.2Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00004.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00024.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4522-1/Third Party Advisory
- https://www.shielder.it/blog/exploiting-an-old-novnc-xss-cve-2017-18635-in-openstack/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.