CVE-2014-1511
CriticalExploitedPublic exploitMozilla: Privilege escalation using WebIDL-implemented APIs (MFSA 2014-29)
Published Mar 18, 2014 · Updated Mar 9, 2026
Key Facts
Patch immediately- CVE-2014-1511 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Firefox (Mozilla), Seamonkey (Mozilla), Thunderbird (Mozilla) and 22 more products.
- It is exploited in the wild, listed in Industry KEV feed since Aug 4, 2016. Public exploit code is available.
- EPSS estimates a 84% probability of exploitation in the next 30 days.
- Fixed versions are available, including Firefox 0:24.4.0-1.el5_10, Firefox 0:24.4.0-1.el6_5, Firefox 24.4.0-1.0.1.el5_10.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
84%
Higher than 99.6% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2014-1511 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25 allow remote attackers to bypass the popup blocker via unspecified vectors.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Aug 4, 2016 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
51 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FirefoxMozilla | See advisory | 28.0 |
| SeamonkeyMozilla | See advisory | 2.25 |
| ThunderbirdMozilla | See advisory | 24.4 |
| Suse Linux Enterprise Software Development KitSuse | 11.0-sp3 | n/a |
| Ubuntu LinuxCanonical | 12.04, 12.10, 13.10 | n/a |
Patched Releases
Firefox
0:24.4.0-1.el5_10, 0:24.4.0-1.el6_5, 24.4.0-1.0.1.el5_10, 24.4.0-1.0.1.el6_5, 28.0
icedove
24.4.0-1~deb7u1
iceweasel
24.4.0esr-1~deb7u2
Seamonkey
2.25, 2.40-6.1
Thunderbird
24.4, 0:24.4.0-1.el5_10, 0:24.4.0-1.el6_5, 24.4.0-1.0.1.el5_10, 24.4.0-1.0.1.el6_5
MozillaFirefox
50.1.0-1.1
MozillaFirefox-branding-upstream
50.1.0-1.1
MozillaFirefox-buildsymbols
50.1.0-1.1
MozillaFirefox-devel
50.1.0-1.1
MozillaFirefox-translations-common
50.1.0-1.1
MozillaFirefox-translations-other
50.1.0-1.1
MozillaThunderbird
45.5.1-1.1
MozillaThunderbird-buildsymbols
45.5.1-1.1
MozillaThunderbird-devel
45.5.1-1.1
MozillaThunderbird-translations-common
45.5.1-1.1
MozillaThunderbird-translations-other
45.5.1-1.1
seamonkey-dom-inspector
2.40-6.1
seamonkey-irc
2.40-6.1
seamonkey-translations-common
2.40-6.1
seamonkey-translations-other
2.40-6.1
Timeline
Publicly disclosed
Mar 18, 2014
Added to Industry KEV feed
Aug 4, 2016
Last updated
Mar 9, 2026
Weakness Type
- CWE-269 Improper Privilege Management
References
- advisorySUSE-SU-2014:0418
- advisoryopenSUSE-SU-2014:0419
- advisoryopenSUSE-SU-2014:0448
- advisoryopenSUSE-SU-2014:0584
- advisoryRHSA-2014:0310
FAQ
Common Questions.
Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25 allow remote attackers to bypass the popup blocker via unspecified vectors.
Affected: Firefox (Mozilla); Seamonkey (Mozilla); Thunderbird (Mozilla), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Aug 4, 2016.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Firefox 0:24.4.0-1.el5_10, Firefox 0:24.4.0-1.el6_5, Firefox 24.4.0-1.0.1.el5_10.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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