Mozilla Characters mapped to U+FFFD in 8 bit encodings cause subsequent character to vanish
Published Jul 30, 2010
4.3
MEDIUMCVSS 2.0
EPSS 1.34%
Description
intl/uconv/util/nsUnicodeDecodeHelper.cpp in Mozilla Firefox before 3.6.7 and Thunderbird before 3.1.1 inserts a U+FFFD sequence into text in certain circumstances involving undefined positions, which might make it easier for remote attackers to conduct cross-site scripting (XSS) attacks via crafted 8-bit text.
Affected products
No data.
Configuration 1
- ≤ 3.6.6
- 0.1
- 0.2
- 0.3
- 0.4
- 0.5
- 0.6
- 0.6.1
- 0.7
- 0.7.1
- 0.8
- 0.9
- 0.9
- 0.9.1
- 0.9.2
- 0.9.3
- 0.10
- 0.10.1
- 1.0
- 1.0
- 1.0.1
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.8
- 1.4.1
- 1.5
- 1.5
- 1.5
- 1.5.0.1
- 1.5.0.2
- 1.5.0.3
- 1.5.0.4
- 1.5.0.5
- 1.5.0.6
- 1.5.0.7
- 1.5.0.8
- 1.5.0.9
- 1.5.0.10
- 1.5.0.11
- 1.5.0.12
- 1.5.1
- 1.5.2
- 1.5.3
- 1.5.4
- 1.5.5
- 1.5.6
- 1.5.7
- 1.5.8
- 1.8
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0.0.1
- 2.0.0.2
- 2.0.0.3
- 2.0.0.4
- 2.0.0.5
- 2.0.0.6
- 2.0.0.7
- 2.0.0.8
- 2.0.0.9
- 2.0.0.10
- 2.0.0.11
- 2.0.0.12
- 2.0.0.13
- 2.0.0.14
- 2.0.0.15
- 2.0.0.16
- 2.0.0.17
- 2.0.0.18
- 2.0.0.19
- 2.0.0.20
- 2.0.0.21
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
- 3.0.10
- 3.0.11
- 3.0.12
- 3.0.13
- 3.0.14
- 3.0.15
- 3.0.16
- 3.0.17
- 3.0.19
- 3.1
- 3.2
- 3.2
- 3.2
- 3.5.1
- 3.5.2
- 3.5.3
- 3.5.4
- 3.5.5
- 3.5.6
- 3.5.7
- 3.5.9
- 3.5.10
- 3.6.1
- 3.6.2
- 3.6.3
- 3.6.4
Configuration 2
- ≤ 3.1
- 0.1
- 0.2
- 0.3
- 0.4
- 0.5
- 0.6
- 0.7
- 0.7.1
- 0.7.2
- 0.7.3
- 0.8
- 0.9
- 1.0
- 1.0.1
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.8
- 1.5
- 1.5
- 1.5.0.1
- 1.5.0.2
- 1.5.0.3
- 1.5.0.4
- 1.5.0.5
- 1.5.0.6
- 1.5.0.7
- 1.5.0.8
- 1.5.0.9
- 1.5.0.10
- 1.5.0.11
- 1.5.0.12
- 1.5.0.13
- 1.5.0.14
- 1.5.1
- 1.5.2
- 1.7.1
- 1.7.3
- 2.0.0.0
- 2.0.0.1
- 2.0.0.2
- 2.0.0.3
- 2.0.0.4
- 2.0.0.5
- 2.0.0.6
- 2.0.0.7
- 2.0.0.8
- 2.0.0.9
- 2.0.0.11
- 2.0.0.12
- 2.0.0.13
- 2.0.0.14
- 2.0.0.15
- 2.0.0.16
- 2.0.0.17
- 2.0.0.18
- 2.0.0.19
- 2.0.0.20
- 2.0.0.21
- 2.0.0.22
- 2.0.0.23
- 3.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
No data.
Red Hat Enterprise Linux 4
firefox-0:3.6.7-2.el4
Fixed · RHSA-2010:0547
Red Hat Enterprise Linux 5
firefox-0:3.6.7-2.el5
Fixed · RHSA-2010:0547
Red Hat Enterprise Linux 5
xulrunner-0:1.9.2.7-2.el5
Fixed · RHSA-2010:0547
Red Hat Enterprise Linux 6
firefox
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | firefox-0:3.6.7-2.el4 | Fixed | RHSA-2010:0547 |
| Red Hat Enterprise Linux 5 | firefox-0:3.6.7-2.el5 | Fixed | RHSA-2010:0547 |
| Red Hat Enterprise Linux 5 | xulrunner-0:1.9.2.7-2.el5 | Fixed | RHSA-2010:0547 |
| Red Hat Enterprise Linux 6 | firefox | Affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.34% (0.01342) | 70.38th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.34% (0.01342) | 67.57th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.27% (0.00275) | 48.90th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.18% (0.00184) | 56.96th | v3 (v2023.03.01) |
| Jun 26, 2024 | 0.18% (0.00184) | 55.87th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.18% (0.00184) | 53.87th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
References (7)
- http://www.mozilla.org/security/announce/2010/mfsa2010-44.html x_refsource_CONFIRMVendor Advisory
- https://access.redhat.com/security/cve/CVE-2010-1210 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=564679 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=615474 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2010-1210
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11863 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2010-1210
| Link | Providers | Tags |
|---|---|---|
| http://www.mozilla.org/security/announce/2010/mfsa2010-44.html | x_refsource_CONFIRMVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2010-1210 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=564679 | x_refsource_CONFIRM | |
| https://bugzilla.redhat.com/show_bug.cgi?id=615474 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2010-1210 | ||
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11863 | vdb-entrysignaturex_refsource_OVAL | |
| https://www.cve.org/CVERecord?id=CVE-2010-1210 |
Change history (0)
No recorded changes yet.