PatchTheCVECVE-2026-73319: XenForo before 2.3.13 contains a cross-site scripting vulnerability in the dynamic redirect handler that allow
CVE-2026-73319 is a medium-severity flaw (CVSS 6.1) affecting xenforo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
XenForo before 2.3.13 contains a cross-site scripting vulnerability in the dynamic redirect handler that allows unauthenticated attackers to execute arbitrary JavaScript in the board origin by crafting a malicious javascript: URI that bypasses host validation. Attackers can embed the board hostname in the URI authority component and use percent-encoded newlines to evade server-side filters, causing authenticated users who perform a Follow action
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.4% (top 65%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2026-09-08 |
| Last modified | 2026-09-11 |
Last updated 2026-09-11 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-73319?
xenforo: upgrade to 2.3.13. Exact commands for each OS are on this page.
Is CVE-2026-73319 being exploited?
CVE-2026-73319 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-73319 affect?
CVE-2026-73319 affects xenforo. Severity is medium (CVSS 6.1). XenForo before 2.3.13 contains a cross-site scripting vulnerability in the dynamic redirect handler that allows unauthenticated attackers to execute arbitrary JavaScript in the board origin by crafting a malicious javascript: URI that bypas
How urgent is CVE-2026-73319?
Priority 35/100. Public exploit reference
Related CVEs
- CVE-2026-73318 LOW 3.8 UPGRADE XenForo before 2.3.13 contains a missing authorization vulnerability in the force-agreement controller that al
- CVE-2026-73313 MEDIUM 6.8 UPGRADE XenForo before 2.3.13 contains a multi-factor authentication bypass vulnerability in the passkey TFA provider
- CVE-2026-73310 MEDIUM 5.9 UPGRADE XenForo before 2.3.13 contains an authorization flaw in the OAuth2 token endpoint that allows attackers contro
- CVE-2026-73309 HIGH 7.4 UPGRADE XenForo before 2.3.13 contains an authentication bypass vulnerability in the OAuth2 token endpoint that allows
- CVE-2026-73316 HIGH 7.5 UPGRADE XenForo before 2.3.13 contains a payment replay vulnerability in the PayPal REST payment provider that allows