HOME VULNERABILITIESCVE-2023-5730

CRITICAL

CVE-2023-5730

CWE-787Published: October 25, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

Risk Analysis

Critical memory safety and corruption bugs affect Firefox, Firefox ESR, and Thunderbird, potentially allowing for arbitrary code execution. These vulnerabilities pose a high risk to users of these applications.

No public exploit is known, and it is not in the KEV. The vulnerability is remotely exploitable with low complexity.

Recommended Action

Update Firefox to 119, Firefox ESR to 115.4, and Thunderbird to 115.4.1 or later.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-5730 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)

debian linux

Mozilla3 product(s)

firefoxfirefox esrthunderbird

Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://bugzilla.mozilla.org/buglist.cgi?bug_id=1836607%2C1840918%2C1848694%2C1848833%2C1850191%2C1850259%2C1852596%2C1853201%2C1854002%2C1855306%2C1855640%2C1856695

ADVISORYhttps://lists.debian.org/debian-lts-announce/2023/10/msg00037.html

ADVISORYhttps://lists.debian.org/debian-lts-announce/2023/10/msg00042.html

ADVISORYhttps://www.debian.org/security/2023/dsa-5535

ADVISORYhttps://www.debian.org/security/2023/dsa-5538

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2023-45/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2023-46/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2023-47/

ADVISORYhttps://bugzilla.mozilla.org/buglist.cgi?bug_id=1836607%2C1840918%2C1848694%2C1848833%2C1850191%2C1850259%2C1852596%2C1853201%2C1854002%2C1855306%2C1855640%2C1856695

ADVISORYhttps://lists.debian.org/debian-lts-announce/2023/10/msg00037.html

ADVISORYhttps://lists.debian.org/debian-lts-announce/2023/10/msg00042.html

ADVISORYhttps://www.debian.org/security/2023/dsa-5535

ADVISORYhttps://www.debian.org/security/2023/dsa-5538

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2023-45/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2023-46/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2023-47/

All References (16)

→

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1836607%2C1840918%2C1848694%2C1848833%2C1850191%2C1850259%2C1852596%2C1853201%2C1854002%2C1855306%2C1855640%2C1856695Issue Tracking · Vendor Advisory

→

https://lists.debian.org/debian-lts-announce/2023/10/msg00037.htmlMailing List · Third Party Advisory

→

https://lists.debian.org/debian-lts-announce/2023/10/msg00042.htmlMailing List · Third Party Advisory

→

https://www.debian.org/security/2023/dsa-5535Mailing List · Third Party Advisory

→

https://www.debian.org/security/2023/dsa-5538Third Party Advisory

→

https://www.mozilla.org/security/advisories/mfsa2023-45/Vendor Advisory

→

https://www.mozilla.org/security/advisories/mfsa2023-46/Vendor Advisory

→

https://www.mozilla.org/security/advisories/mfsa2023-47/Vendor Advisory

→

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1836607%2C1840918%2C1848694%2C1848833%2C1850191%2C1850259%2C1852596%2C1853201%2C1854002%2C1855306%2C1855640%2C1856695Issue Tracking · Vendor Advisory

→

https://lists.debian.org/debian-lts-announce/2023/10/msg00037.htmlMailing List · Third Party Advisory

→

https://lists.debian.org/debian-lts-announce/2023/10/msg00042.htmlMailing List · Third Party Advisory

→

https://www.debian.org/security/2023/dsa-5535Mailing List · Third Party Advisory

→

https://www.debian.org/security/2023/dsa-5538Third Party Advisory

→

https://www.mozilla.org/security/advisories/mfsa2023-45/Vendor Advisory

→

https://www.mozilla.org/security/advisories/mfsa2023-46/Vendor Advisory

Quick Facts

CVE IDCVE-2023-5730

CVSS Score9.8 / 10

SeverityCRITICAL

WeaknessCWE-787

CISA KEVNo

Affected2 vendor(s)

PublishedOct 25, 2023

Related CVEs (CWE-787)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2023-5730 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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