By observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect.
Noroxi assessment
Priority: Monitor (action score 26/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 69.2% of all records.
- 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.
- Fixed version: firefox-esr (Debian:10) 68.11.0esr-1~deb10u1; thunderbird (Debian:10) 1:68.11.0-1~deb10u1; firefox-esr (Debian:12) 68.11.0esr-1.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to firefox-esr (Debian:10) 68.11.0esr-1~deb10u1; thunderbird (Debian:10) 1:68.11.0-1~deb10u1; firefox-esr (Debian:12) 68.11.0esr-1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
By observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect. This applied only to content that can be parsed as script. This vulnerability affects Firefox < 79, Firefox ESR < 68.11, Firefox ESR < 78.1, Thunderbird < 68.11, and Thunderbird < 78.1.
- BDU:2022-05935
- DLA-2297-1
- DLA-2310-1
- DSA-4736-1
- DSA-4740-1
- openSUSE-SU-2020:1147-1
- openSUSE-SU-2020:1155-1
- openSUSE-SU-2020:1179-1
- openSUSE-SU-2020:1189-1
- openSUSE-SU-2020:1205-1
- RHSA-2020:3229
- RHSA-2020:3233
- RHSA-2020:3241
- RHSA-2020:3253
- RHSA-2020:3254
- RHSA-2020:3341
- RHSA-2020:3342
- RHSA-2020:3343
- RHSA-2020:3344
- RHSA-2020:3345
- Published
- Aug 10, 2020
- Updated
- Jun 16, 2026
- EPSS
- 1.2% · 69th percentile
- CWE
- CWE-346
Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.2%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| mozilla | firefox | cpe:2.3:a:mozilla:firefox |
| mozilla | firefox esr | cpe:2.3:a:mozilla:firefox_esr |
| mozilla | thunderbird | cpe:2.3:a:mozilla:thunderbird |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux16.04
- canonical ubuntu linux18.04
- canonical ubuntu linux20.04
- mozilla firefoxbefore 79.0
- mozilla firefox78.0 and later · before 78.1
- mozilla firefox esrbefore 68.11
- mozilla thunderbird78.0 and later · before 78.1
- mozilla thunderbirdbefore 68.11
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 79affected
Mozilla Firefox ESR
- unspecified and later · before 68.11affected
- unspecified and later · before 78.1affected
Mozilla Thunderbird
- unspecified and later · before 68.11affected
- unspecified and later · before 78.1affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | firefox-esr | before 68.11.0esr-1~deb10u1 | 68.11.0esr-1~deb10u1 |
| Debian:10 | thunderbird | before 1:68.11.0-1~deb10u1 | 1:68.11.0-1~deb10u1 |
| Debian:12 | firefox-esr | before 68.11.0esr-1 | 68.11.0esr-1 |
| Debian:12 | thunderbird | before 1:68.11.0-1 | 1:68.11.0-1 |
| Debian:9 | firefox-esr | before 68.11.0esr-1~deb9u1 | 68.11.0esr-1~deb9u1 |
| Debian:9 | thunderbird | before 1:68.11.0-1~deb9u1 | 1:68.11.0-1~deb9u1 |
| openSUSE:Leap 15.1 | MozillaFirefox | before 78.1.0-lp151.2.61.1 | 78.1.0-lp151.2.61.1 |
| openSUSE:Leap 15.1 | MozillaThunderbird | before 68.11.0-lp151.2.47.1 | 68.11.0-lp151.2.47.1 |
| openSUSE:Leap 15.2 | MozillaFirefox | before 78.1.0-lp152.2.15.1 | 78.1.0-lp152.2.15.1 |
| openSUSE:Leap 15.2 | MozillaFirefox | before 78.1.0-lp152.2.12.1 | 78.1.0-lp152.2.12.1 |
| openSUSE:Leap 15.2 | MozillaThunderbird | before 68.11.0-lp152.2.7.1 | 68.11.0-lp152.2.7.1 |
| openSUSE:Leap 15.2 | pipewire | before 0.3.6-lp152.2.3.1 | 0.3.6-lp152.2.3.1 |
| Red Hat:enterprise_linux:6::client | firefox | before 0:68.11.0-1.el6_10 | 0:68.11.0-1.el6_10 |
| Red Hat:enterprise_linux:6::client | firefox-debuginfo | before 0:68.11.0-1.el6_10 | 0:68.11.0-1.el6_10 |
| Red Hat:enterprise_linux:6::client | thunderbird | before 0:68.11.0-1.el6_10 | 0:68.11.0-1.el6_10 |
| Red Hat:enterprise_linux:6::client | thunderbird-debuginfo | before 0:68.11.0-1.el6_10 | 0:68.11.0-1.el6_10 |
| Red Hat:enterprise_linux:7::client | firefox | before 0:68.11.0-1.el7_8 | 0:68.11.0-1.el7_8 |
| Red Hat:enterprise_linux:7::client | firefox-debuginfo | before 0:68.11.0-1.el7_8 | 0:68.11.0-1.el7_8 |
| Red Hat:enterprise_linux:7::client | thunderbird | before 0:68.11.0-1.el7_8 | 0:68.11.0-1.el7_8 |
| Red Hat:enterprise_linux:7::client | thunderbird-debuginfo | before 0:68.11.0-1.el7_8 | 0:68.11.0-1.el7_8 |
| Red Hat:enterprise_linux:8::appstream | firefox | before 0:68.11.0-1.el8_2 | 0:68.11.0-1.el8_2 |
| Red Hat:enterprise_linux:8::appstream | firefox-debuginfo | before 0:68.11.0-1.el8_2 | 0:68.11.0-1.el8_2 |
| Red Hat:enterprise_linux:8::appstream | firefox-debugsource | before 0:68.11.0-1.el8_2 | 0:68.11.0-1.el8_2 |
| Red Hat:enterprise_linux:8::appstream | thunderbird | before 0:68.11.0-1.el8_2 | 0:68.11.0-1.el8_2 |
+21
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
Published before and after this one in the same product
- ← EarlierCVE-2020-15648Aug 10, 2020 · Using object or embed tags, it was possible to frame other websites, even if they disallowed framing using the X-Frame-Options header.26Monitor
- ← EarlierCVE-2020-15651Aug 10, 2020 · A unicode RTL order character in the downloaded file name can be used to change the file's name during the download UI flow to change the fi17Monitor
- Later →CVE-2020-15653Aug 10, 2020 · An iframe sandbox element with the allow-popups flag could be bypassed when using noopener links.26Monitor
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 |
|---|---|---|
| debian:firefox-esr | 68.11.0esr-1 · Debian:12 | Package registry (OSV) |
| debian:thunderbird | 1:68.11.0-1 · Debian:12 | Package registry (OSV) |
| opensuse:MozillaFirefox | 78.1.0-lp151.2.61.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:MozillaThunderbird | 68.11.0-lp151.2.47.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:pipewire | 0.3.6-lp152.2.3.1 · openSUSE:Leap 15.2 | Package registry (OSV) |
| red hat:firefox | 0:68.11.0-1.el8_0 · Red Hat:rhel_e4s:8.0::appstream | Package registry (OSV) |
| red hat:firefox-debuginfo | 0:68.11.0-1.el8_0 · Red Hat:rhel_e4s:8.0::appstream | Package registry (OSV) |
| red hat:firefox-debugsource | 0:68.11.0-1.el8_0 · Red Hat:rhel_e4s:8.0::appstream | Package registry (OSV) |
| red hat:thunderbird | 0:68.11.0-1.el8_2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:thunderbird-debuginfo | 0:68.11.0-1.el8_2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:thunderbird-debugsource | 0:68.11.0-1.el8_2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| suse:MozillaFirefox | 78.1.0-78.87.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:MozillaFirefox-branding-SLE | 78-9.2.4 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP2 | Package registry (OSV) |
| suse:MozillaThunderbird | 68.11.0-3.91.1 · SUSE:Linux Enterprise Workstation Extension 15 SP1 | Package registry (OSV) |
| suse:pipewire | 0.3.6-3.3.2 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP2 | 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.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-20-573 · Aug 7, 2020(Thunderbird Zafiyeti)
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
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-346 · Origin Validation ErrorCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
nvd-primary
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)
- JSON Hijacking (aka JavaScript Hijacking)CAPEC-111likelihood: High · High
- Cache PoisoningCAPEC-141likelihood: High · High
- DNS Cache PoisoningCAPEC-142likelihood: High · High
- Exploit Script-Based APIsCAPEC-160Medium
- Exploitation of Trusted IdentifiersCAPEC-21likelihood: High · High
- Application API Message Manipulation via Man-in-the-MiddleCAPEC-384Low
- Transaction or Event Tampering via Application API ManipulationCAPEC-385Medium
- Application API Navigation RemappingCAPEC-386Medium
ATT&CK techniques
- Access Token ManipulationT1134
- Access Token Manipulation:Token Impersonation/TheftT1134.001
- Steal Application Access TokenT1528
- Steal Web Session CookieT1539
- Use Alternate Authentication Material:Web Session CookieT1550.004
- Adversary-in-the-Middle: ARP Cache PoisoningT1557.002
- Compromise Infrastructure: DNS ServerT1584.002
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (9 more)Show less
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00032.html
- bugzilla.mozilla.org/show_bug.cgi?id=1634872
- usn.ubuntu.com/4443-1/
- www.mozilla.org/security/advisories/mfsa2020-30/
- www.mozilla.org/security/advisories/mfsa2020-31/
- www.mozilla.org/security/advisories/mfsa2020-32/
- www.mozilla.org/security/advisories/mfsa2020-33/
- www.mozilla.org/security/advisories/mfsa2020-35/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.