CVE-2012-1251 json
Opera before 9.63 does not properly verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers a…
published 2012-06-04 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-1277
- cvss
- 5.8
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
Opera before 9.63 does not properly verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
Classification
- Weakness
-
- CWE-310 Cryptographic Issues
References
- opera.com /docs/changelogs/mac/963/
- opera.com /docs/changelogs/windows/963/
- opera.com /docs/changelogs/unix/963/
-
jvn.jp
/en/jp/JVN39707339/index.html
third-party-advisory
-
jvndb.jvn.jp
/jvndb/JVNDB-2012-000049
third-party-advisory
Sources
- CVE List CVE-2012-1251
- NVD CVE-2012-1251
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.