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CVE Record

CVE-2019-11715: Due to an error while parsing page content, it is possible for properly sanitized user input to be misinter...

Due to an error while parsing page content, it is possible for properly sanitized user input to be misinterpreted and lead to XSS hazards on web sites in certain circumstances. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

A Mozilla parsing bug could turn otherwise sanitized website input into a cross-site scripting hazard in affected Firefox, Firefox ESR, and Thunderbird versions. This matters most for organizations with legacy browser or email-client versions still present on endpoints.

Executive priority

Treat this as a legacy exposure cleanup item unless affected versions are still present. Prioritize environments with unmanaged endpoints, long-lived Linux images, or users who process untrusted web or email content.

Technical view

CVE-2019-11715 is an XSS-related content parsing flaw affecting Firefox ESR before 60.8, Firefox before 68, and Thunderbird before 60.8. The source bundle does not provide CVSS, CWE, proof-of-concept status, or exploit details.

Likely exposure

Exposure is most likely on unmanaged, legacy, or frozen endpoints running older Mozilla browser or Thunderbird packages from before July-August 2019 security updates.

Exploitation context

CISA KEV status is false in the provided bundle, and no cited source here states active exploitation. The risk is browser or mail-client content handling that may undermine expected sanitization in certain circumstances.

Researcher notes

The available record describes an XSS hazard caused by page-content parsing, but does not include CVSS, CWE, exploit maturity, or detailed root-cause notes. Analysis should stay version-based and vendor-advisory-driven.

Mitigation direction

  • Upgrade Firefox to 68 or later where Firefox is still deployed.
  • Upgrade Firefox ESR to 60.8 or later where ESR is used.
  • Upgrade Thunderbird to 60.8 or later where Thunderbird is used.
  • Apply relevant Debian, openSUSE, Gentoo, or vendor security updates.
  • Check current Mozilla and OS vendor guidance for supported replacement versions.

Validation and detection

  • Inventory endpoint Firefox, Firefox ESR, and Thunderbird versions.
  • Confirm no Firefox installations remain below version 68.
  • Confirm no Firefox ESR or Thunderbird installations remain below version 60.8.
  • Review Linux package security update status for Mozilla packages.
  • Check vulnerability scanner findings against actual installed versions.
Prepared
Confidence
medium
Sources
10

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2019-11715 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
9Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
MozillaFirefox ESRunspecifiedListed
MozillaFirefoxunspecifiedListed
MozillaThunderbirdunspecifiedListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.