CVE-2017-7823: debian debian_linux Cross-site Scripting
Vulnerability summary
CVE-2017-7823 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in debian debian_linux. EPSS estimates a 1.44% chance of exploitation in the next 30 days, higher than 72.7% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 18 · Related 10Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The content security policy (CSP) "sandbox" directive did not create a unique origin for the document, causing it to behave as if the "allow-same-origin" keyword were always specified. This could allow a Cross-Site Scripting (XSS) attack to be launched from unsafe content. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.4MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated5.4MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
EPSS trend
Probability
1.44%
Chance of exploitation in the next 30 days
Percentile
73%
Versus all other CVEs
30-day change
-0.03 pp
From 1.47% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugzilla.mozilla.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Redhat5 products
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.4
- enterprise_linux_server_eus7.4 | 7.5
- enterprise_linux_workstation6.0 | 7.0
Debian3 products
- firefox-esr< 52.4.0esr-2
- thunderbird< 1:52.4.0-1
- debian_linuxEOL7.0 | 8.0 | 9.0
Mozilla3 products
- firefox≥ unspecified, < 56 | < 52.4.0 | < 56.0
- firefox_esr≥ unspecified, < 52.4
- thunderbird≥ unspecified, < 52.4 | < 52.4.0
Ubuntu2 products
- firefox< 56.0+build6-0ubuntu0.14.04.1 | < 56.0+build6-0ubuntu0.16.04.1 | < 56.0+build6-0ubuntu1
- thunderbird< 1:52.4.0+build1-0ubuntu0.14.04.2 | < 1:52.4.0+build1-0ubuntu0.16.04.2 | < 1:52.4.0+build1-0ubuntu2
4 vendors · 13 products
References
18 links
lists.debian.org/debian-lts-announce/2017/11/msg00000.htmlMailing ListX Refsource MLISTThird Party Advisory