CVE-2009-3266
Opera before 10.01 does not properly restrict HTML in a (1) RSS or (2) Atom feed, which allows remote attackers to conduct cross-site…
- 4.3MediumCVSS base score
- 2.7%Exploitation in 30 daysEPSS · top 14% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Opera before 10.01 does not properly restrict HTML in a (1) RSS or (2) Atom feed, which allows remote attackers to conduct cross-site scripting (XSS) attacks, and conduct cross-zone scripting attacks involving the Feed Subscription Page to read feeds or create feed subscriptions, via a crafted feed, related to the rendering of the application/rss+xml content type as "scripted content."
Timeline
ID reserved
By mitre
Published
- 15 years later
· 15 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
- EPSS (exploitation in 30 days)
- 2.7% · top 14% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
n/a
- affected n/a
References
References15
- http://www.opera.com/support/kb/view/939/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- ADV-2009-3073 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 20090916 Exploiting Chrome and Opera's inbuilt ATOM/RSS reader with Script Execution and more (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20091028 Hijacking Opera's Native Page using malicious RSS payloads (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- http://securethoughts.com/2009/10/hijacking-operas-native-page-using-malicious-rss-payloads/ (opens in a new tab)x_refsource_MISCx_transferred
- 59358 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- http://www.opera.com/docs/changelogs/unix/1001/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- 37182 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 36850 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://securethoughts.com/2009/09/exploiting-chrome-and-operas-inbuilt-atomrss-reader-with-script-execution-and-more/ (opens in a new tab)x_refsource_MISCx_transferred
- 36418 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- opera-feed-security-bypass(54021) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- oval:org.mitre.oval:def:6314 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- http://www.opera.com/docs/changelogs/mac/1001/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.opera.com/docs/changelogs/windows/1001/ (opens in a new tab)x_refsource_CONFIRMx_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)
- EUVD EUVD-2009-3249 (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://cveledger.app/cve/CVE-2009-3266)Record last updated .