Cross-site scripting in rebelcode RSS Aggregator – RSS Import, News Feeds, Feed to Post…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting via postMessage in all versions up to, and including, 5.0.11. This is due to the plugin's admin-shell.js registering a global message event listener without origin validation (missing event.origin check) and directly passing user-controlled URLs to window.open() without URL scheme validation. This makes it possible for unauthenticated attackers to execute arbitrary JavaScript in the context of an authenticated administrator's session by tricking them into visiting a malicious website that sends crafted postMessage payloads to the plugin's admin page.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-2433
- 2026-10-03 Alias added: GHSA-4j4f-wwp5-72mp
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/311960e7-c4b4-4638-980f-1e08ffa621ba?source=cve
- https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/trunk/core/js/admin-shell.js#L58
- https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/tags/5.0.10/core/js/admin-shell.js#L58
- https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/trunk/core/js/admin-shell.js#L153
- https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/tags/5.0.10/core/js/admin-shell.js#L153
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3473511%40wp-rss-aggregator%2Ftrunk&old=3439393%40wp-rss-aggregator%2Ftrunk&sfp_email=&sfph_mail=
More rebelcode vulnerabilities
- TI-2024-08890 RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging <= 4.23.12 - Missing Authorization CVSS 3.1MEDIUM 5.4
- TI-2023-00363 Spotlight Social Feeds < 1.4.3 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
- TI-2026-00937 RSS Aggregator <= 5.0.10 - Reflected Cross-Site Scripting via 'template' Parameter CVSS 3.1HIGH 7.2
- TI-2025-19674 WordPress Spotlight Social Feeds plugin <= 1.7.1 - Sensitive Data Exposure vulnerability CVSS 3.1MEDIUM 5.3
- TI-2025-13462 Cross-site scripting in rebelcode RSS Aggregator – RSS Import, News Feeds, Feed to Post… CVSS 3.1MEDIUM 6.4
- TI-2022-04562 Freemius SDK <= 2.4.2 - Missing Authorization Checks CVSS 3.1MEDIUM 6.3
Sources
- CVE-2026-2433 · CVE Program
- CVE-2026-2433 · NVD
- FIRST EPSS
- GHSA-4j4f-wwp5-72mp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences