CVE-2017-18635

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

4.81% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 91.2% of scored records. A rank, not a probability.

NVD base score

6.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2019-09-25 22:59Z6 YR AGO

Last updated

2024-08-05 21:28Z2 YR AGO

Reserved

2019-09-25

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

c4e1030032b6a73306f5b1b25dc150115d72a88a9005eccf09ba1140ac7b8537

• github.comhttps://github.com/novnc/noVNC/issues/748x_refsource_MISC
• github.comhttps://github.com/novnc/noVNC/releases/tag/v0.6.2x_refsource_MISC
• bugs.launchpad.nethttps://bugs.launchpad.net/horizon/+bug/1656435x_refsource_MISC
• github.comhttps://github.com/novnc/noVNC/commit/6048299a138e078aed210f163111698c8c526a13#diff-286f7dc7b881e942e97cd50c10898f03L534x_refsource_MISC
• lists.debian.org[debian-lts-announce] 20191005 [SECURITY] [DLA 1946-1] novnc security updatehttps://lists.debian.org/debian-lts-announce/2019/10/msg00004.htmlmailing-listx_refsource_MLIST
• www.shielder.ithttps://www.shielder.it/blog/exploiting-an-old-novnc-xss-cve-2017-18635-in-openstack/x_refsource_MISC
• github.comhttps://github.com/ShielderSec/cve-2017-18635x_refsource_MISC
• access.redhat.comRHSA-2020:0754https://access.redhat.com/errata/RHSA-2020:0754vendor-advisoryx_refsource_REDHAT
• usn.ubuntu.comUSN-4522-1https://usn.ubuntu.com/4522-1/vendor-advisoryx_refsource_UBUNTU
• lists.debian.org[debian-lts-announce] 20211228 [SECURITY] [DLA 2854-1] novnc security updatehttps://lists.debian.org/debian-lts-announce/2021/12/msg00024.htmlmailing-listx_refsource_MLIST