The SVG implementation in Mozilla Firefox 8.0, Thunderbird 8.0, and SeaMonkey 2.5 does not properly interact with DOMAttrModified event handlers, which allows remote attackers to cause a denial of service (out-of-bounds memory access) or possibly have unspecified other impact via vectors involving removal of SVG elements.
Conclusion & alert: CVE-2011-3658 is rated High Exploit Risk (79.4/100): CVSS High severity, with high exploitation likelihood (EPSS 69.88%, 99th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 18847 | exploit_db | edb | 2012-05-09 | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-23 | 70.19% | 69.88% | -0.31% |
| 2 | 2026-06-15 | 75.88% | 70.19% | -5.69% |
| 3 | 2025-03-17 | — | 75.88% | — |
Full EPSS history (15 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
high | CVE-2011-3658: 1 GLSA(s) (201301-01), 14 atom(s) (dev-libs/nss, mail-client/mozilla-thunderbird, …); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-3658 |
redhat
|
critical | — | https://access.redhat.com/security/cve/CVE-2011-3658 |
suse
|
high | CVE-2011-3658 severity important: SUSE including 66 source package names (MozillaFirefox-10.0-0.3.2, MozillaFirefox-140.2.0-160000.1.2, …), 82 product×package rows across 30 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (30 product lines)): Fixed 82. | https://www.suse.com/security/cve/CVE-2011-3658/ |
ubuntu
|
low | CVE-2011-3658 low priority: Ubuntu including 5 source packages (firefox, seamonkey, thunderbird, xulrunner-1.9.2, xulrunner-2.0), 50 status rows across 10 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, upstream): DNE 17, released 11, ignored 10, not-affected 8, needs-triage 4. | https://ubuntu.com/security/CVE-2011-3658 |