CVE-2026-73312: XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh t

Q: How do I fix CVE-2026-73312?

xenforo: upgrade to 2.3.13. Exact commands for each OS are on this page.

Q: Is CVE-2026-73312 being exploited?

CVE-2026-73312 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-73312 affect?

CVE-2026-73312 affects xenforo. Severity is high (CVSS 7.4). XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can r

Q: How urgent is CVE-2026-73312?

Priority 46/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.4REMOTEUPGRADE

CVE-2026-73312 is a high-severity flaw (CVSS 7.4) 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 refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can repeatedly submit the same refresh token to generate additional independent token pairs, achieving persistent unauthorized access for the token's full lifetime.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-294
Published	2026-09-08
Last modified	2026-09-11

Publisher (CNA): VulnCheck · Vendor: xenforo

Last updated 2026-09-11 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-08 14:17 UTCPublished CVE record published
2026-09-11 20:30 UTCUpdated Record last modified

xenforo xenforo UPGRADE

Affected: < 2.3.13

Fixed in: 2.3.13

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy xenforo || rpm -q xenforo || xenforo --version

2. UPGRADE to 2.3.13 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade xenforo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xenforo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2026-73312?

xenforo: upgrade to 2.3.13. Exact commands for each OS are on this page.

Is CVE-2026-73312 being exploited?

CVE-2026-73312 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-2026-73312 affect?

CVE-2026-73312 affects xenforo. Severity is high (CVSS 7.4). XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can r

How urgent is CVE-2026-73312?

Priority 46/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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