PatchTheCVECVE-2026-73320: XenForo before 2.3.13 contains an unauthenticated information disclosure vulnerability that allows unauthentic
CVE-2026-73320 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 an unauthenticated information disclosure vulnerability that allows unauthenticated attackers to retrieve private unfurl records by supplying predictable auto-increment primary key IDs to the unfurl endpoint. Attackers can enumerate or predict result IDs and query the endpoint without any session, user, or visibility checks to obtain rendered preview HTML, original URLs, and query strings from private conversations
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 70%) |
| CISA exploited list | No |
| Weakness | CWE-639 |
| 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-2026-73320?
xenforo: upgrade to 2.3.13. Exact commands for each OS are on this page.
Is CVE-2026-73320 being exploited?
CVE-2026-73320 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-2026-73320 affect?
CVE-2026-73320 affects xenforo. Severity is medium (CVSS 6.1). XenForo before 2.3.13 contains an unauthenticated information disclosure vulnerability that allows unauthenticated attackers to retrieve private unfurl records by supplying predictable auto-increment primary key IDs to the unfurl endpoint.
How urgent is CVE-2026-73320?
Priority 34/100. 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