# Memory safety bugs present in Firefox 111 and Firefox ESR 102.9.

CVE record · `CVE-2023-29550`

- **Identifiers:** `CVE-2023-29550`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **CNA:** mozilla
- **Technologies:** [Mozilla Firefox](https://agentprime.io/advisories/technology/mozilla-firefox.md) · [Mozilla Focus for Android](https://agentprime.io/advisories/technology/mozilla-focus-for-android.md) · [Mozilla Firefox ESR](https://agentprime.io/advisories/technology/mozilla-firefox-esr.md) · [Mozilla Firefox for Android](https://agentprime.io/advisories/technology/mozilla-firefox-for-android.md) · [Mozilla Thunderbird](https://agentprime.io/advisories/technology/mozilla-thunderbird.md)
- **Published:** 2 Jun 2023
- **Updated:** 10 Jan 2025
- **Reviewed by a person:** No

Published by the CVE Program (CNA: mozilla) at 2 Jun 2023, 00:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Mozilla. Product: Firefox.
  - affected: `unspecified to before 112` (custom)
- Vendor: Mozilla. Product: Focus for Android.
  - affected: `unspecified to before 112` (custom)
- Vendor: Mozilla. Product: Firefox ESR.
  - affected: `unspecified to before 102.10` (custom)
- Vendor: Mozilla. Product: Firefox for Android.
  - affected: `unspecified to before 112` (custom)
- Vendor: Mozilla. Product: Thunderbird.
  - affected: `unspecified to before 102.10` (custom)

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 8.8 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`, from ADP (CISA-ADP)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0071, the 53rd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 2 Jun 2023. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2023-29550](https://www.cve.org/CVERecord?id=CVE-2023-29550)
- [NVD: CVE-2023-29550](https://nvd.nist.gov/vuln/detail/CVE-2023-29550)

### References from the CNA

- <https://www.mozilla.org/security/advisories/mfsa2023-15/>
- <https://www.mozilla.org/security/advisories/mfsa2023-14/>
- <https://www.mozilla.org/security/advisories/mfsa2023-13/>
- <https://bugzilla.mozilla.org/buglist.cgi?bug_id=1720594%2C1812498%2C1814217%2C1818357%2C1751945%2C1818762%2C1819493%2C1820389%2C1820602%2C1821448%2C1822413%2C1824828>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2023-29550>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2023-29550/>. Everything for agents: <https://agentprime.io/llms.txt>.