The content security policy (CSP) "sandbox" directive did not create a unique origin for the document, causing it to behave as if the…

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.

Scores

EPSS (exploitation in 30 days)

1.4% · top 27% of all CVEs (3 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.

Weakness

• CSP sandbox directive did not create a unique origin
• CWE-79 (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• Mozilla · Firefox

  • affected unspecified – < 56

• Mozilla · Firefox ESR

  • affected unspecified – < 52.4

• Mozilla · Thunderbird

  • affected unspecified – < 52.4

References (12)

• https://bugzilla.mozilla.org/show_bug.cgi?id=1396320 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 101059 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• [debian-lts-announce] 20171101 [SECURITY] [DLA 1153-1] icedove/thunderbird security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://www.mozilla.org/security/advisories/mfsa2017-22/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• 1039465 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• RHSA-2017:2831 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2017:2885 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• https://www.mozilla.org/security/advisories/mfsa2017-21/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• DSA-4014 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• https://www.mozilla.org/security/advisories/mfsa2017-23/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• DSA-3987 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• GLSA-201803-14 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_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

[![CVE-2017-7823](https://trackcve.app/badge/CVE-2017-7823.svg)](https://trackcve.app/cve/CVE-2017-7823)

Record last updated 5 Aug 2024, 16:12 UTC.