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CVE-2018-18500
A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream…
Critical9.8EPSS 12.7%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 12.7% · top 3.7% of all CVEs (5 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
n/a
- affected n/a
References (17)
- RHSA-2019:0219 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://www.mozilla.org/security/advisories/mfsa2019-01/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-3897-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 106781 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- GLSA-201903-04 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- USN-3874-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- RHSA-2019:0269 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:0218 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://www.mozilla.org/security/advisories/mfsa2019-02/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-4376 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- [debian-lts-announce] 20190216 [SECURITY] [DLA 1678-1] thunderbird security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [debian-lts-announce] 20190130 [SECURITY] [DLA 1648-1] firefox-esr security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://www.mozilla.org/security/advisories/mfsa2019-03/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-4392 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- RHSA-2019:0270 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- GLSA-201904-07 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- openSUSE-SU-2019:1758 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2018-18500)Record last updated .