Firefox adds web-compatibility shims in place of some tracking scripts blocked by Enhanced Tracking Protection.
Firefox adds web-compatibility shims in place of some tracking scripts blocked by Enhanced Tracking Protection. On a site protected by Content Security Policy in "strict-dynamic" mode, an attacker able to inject an HTML element could have used a DOM Clobbering attack on some of the shims and achieved XSS, bypassing the CSP strict-dynamic protection. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, and Firefox ESR < 128.1.
- Published
- Aug 6, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.5% · 40th percentile
- CWE
- CWE-79
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Report tools
Action score
24
Monitor
Low priority for now.
- CVSS
- 24 / 40 · 6.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| mozilla | firefox | cpe:2.3:a:mozilla:firefox |
| mozilla | firefox esr | cpe:2.3:a:mozilla:firefox_esr |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- mozilla firefoxbefore 129.0
- mozilla firefox esrbefore 115.14
- mozilla firefox esr116.0 and later · before 128.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (mozilla). Independent of NVD's CPE analysis and usually ahead of it.
Mozilla Firefox
- unspecified and later · before 129affected
Mozilla Firefox ESR
- unspecified and later · before 115.14affected
- unspecified and later · before 128.1affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | firefox | before 115.14.0-2.el8_10.alma.1 | 115.14.0-2.el8_10.alma.1 |
| AlmaLinux:9 | firefox | before 115.14.0-2.el9_4.alma.1 | 115.14.0-2.el9_4.alma.1 |
| AlmaLinux:9 | firefox-x11 | before 115.14.0-2.el9_4.alma.1 | 115.14.0-2.el9_4.alma.1 |
| Debian:11 | firefox-esr | before 115.14.0esr-1~deb11u1 | 115.14.0esr-1~deb11u1 |
| Debian:12 | firefox-esr | before 115.14.0esr-1~deb12u1 | 115.14.0esr-1~deb12u1 |
| Debian:13 | firefox-esr | before 115.14.0esr-1 | 115.14.0esr-1 |
| openSUSE:Tumbleweed | MozillaFirefox | before 129.0-1.1 | 129.0-1.1 |
| Red Hat:enterprise_linux:8::appstream | firefox | before 0:115.14.0-2.el8_10 | 0:115.14.0-2.el8_10 |
| Red Hat:enterprise_linux:8::appstream | firefox-debuginfo | before 0:115.14.0-2.el8_10 | 0:115.14.0-2.el8_10 |
| Red Hat:enterprise_linux:8::appstream | firefox-debugsource | before 0:115.14.0-2.el8_10 | 0:115.14.0-2.el8_10 |
| Red Hat:enterprise_linux:9::appstream | firefox | before 0:115.14.0-2.el9_4 | 0:115.14.0-2.el9_4 |
| Red Hat:enterprise_linux:9::appstream | firefox-debuginfo | before 0:115.14.0-2.el9_4 | 0:115.14.0-2.el9_4 |
| Red Hat:enterprise_linux:9::appstream | firefox-debugsource | before 0:115.14.0-2.el9_4 | 0:115.14.0-2.el9_4 |
| Red Hat:enterprise_linux:9::appstream | firefox-x11 | before 0:115.14.0-2.el9_4 | 0:115.14.0-2.el9_4 |
| Red Hat:rhel_aus:8.2::appstream | firefox | before 0:115.14.0-2.el8_2 | 0:115.14.0-2.el8_2 |
| Red Hat:rhel_aus:8.2::appstream | firefox-debuginfo | before 0:115.14.0-2.el8_2 | 0:115.14.0-2.el8_2 |
| Red Hat:rhel_aus:8.2::appstream | firefox-debugsource | before 0:115.14.0-2.el8_2 | 0:115.14.0-2.el8_2 |
| Red Hat:rhel_aus:8.4::appstream | firefox | before 0:115.14.0-2.el8_4 | 0:115.14.0-2.el8_4 |
| Red Hat:rhel_aus:8.4::appstream | firefox-debuginfo | before 0:115.14.0-2.el8_4 | 0:115.14.0-2.el8_4 |
| Red Hat:rhel_aus:8.4::appstream | firefox-debugsource | before 0:115.14.0-2.el8_4 | 0:115.14.0-2.el8_4 |
| Red Hat:rhel_aus:8.6::appstream | firefox | before 0:115.14.0-2.el8_6 | 0:115.14.0-2.el8_6 |
| Red Hat:rhel_aus:8.6::appstream | firefox-debuginfo | before 0:115.14.0-2.el8_6 | 0:115.14.0-2.el8_6 |
| Red Hat:rhel_aus:8.6::appstream | firefox-debugsource | before 0:115.14.0-2.el8_6 | 0:115.14.0-2.el8_6 |
| Red Hat:rhel_e4s:9.0::appstream | firefox | before 0:115.14.0-2.el9_0 | 0:115.14.0-2.el9_0 |
+12
Same product
mozilla: all recordsOther highest-scoring records for the same primary product.
- CVE-2010-3765Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x befKEV94Now
- CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxeKEV87Now
- CVE-2015-4495The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to bypassKEV86Now
- CVE-2013-1690Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 do not properKEV86Now
- CVE-2019-17026Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion.KEV79This week
- CVE-2024-9680An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines.KEV76This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:firefox | 115.14.0-2.el9_4.alma.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:firefox-x11 | 115.14.0-2.el9_4.alma.1 · AlmaLinux:9 | Package registry (OSV) |
| debian:firefox-esr | 115.14.0esr-1~deb12u1 · Debian:12 | Package registry (OSV) |
| opensuse:MozillaFirefox | 129.0-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:firefox | 0:115.14.0-2.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:firefox-debuginfo | 0:115.14.0-2.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:firefox-debugsource | 0:115.14.0-2.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:firefox-x11 | 0:115.14.0-2.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| rocky linux:firefox | 0:115.14.0-2.el8_10 · Rocky Linux:8 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2024-477684 days apartA file dialog shown while in full-screen mode could have resulted in the window remaining disabled.32Monitor
- CVE-2025-10534406 days apartSpoofing issue in the Site Permissions component32Monitor
- CVE-2024-939456 days apartAn attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://devtools` origin.30Monitor
- CVE-2024-1046184 days apartIn multipart/x-mixed-replace responses, `Content-Disposition: attachment` in the response header was not respected and did not force a downl24Monitor
- CVE-2024-11694112 days apartEnhanced Tracking Protection's Strict mode may have inadvertently allowed a CSP `frame-src` bypass and DOM-based XSS through the Google Safe24Monitor
- CVE-2025-6430322 days apartContent-Disposition header ignored when a file is included in an embed or object tag24Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- low · data or configuration can be modified
- Availability
- none
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvd-primary
Root cause
User content is inserted into the page as HTML. The browser interprets the content as code rather than data.
The bug in code
The whole CWE-79 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
commentEl.innerHTML = comment.body;Fixed
commentEl.textContent = comment.body;Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- bugzilla.mozilla.org/show_bug.cgi?id=1909241
- www.mozilla.org/security/advisories/mfsa2024-33/
- www.mozilla.org/security/advisories/mfsa2024-34/
- www.mozilla.org/security/advisories/mfsa2024-35/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.