How severe is CVE-2023-22453?

CVE-2023-22453 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-22453 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-22453?

CVE-2023-22453 primarily affects Discourse. In total, 206 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-22453?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-22453 published?

CVE-2023-22453 was published on 2023-01-05 and last updated on 2026-06-17.

CVE-2023-22453

CVE-2023-22453 is a medium-severity vulnerability in Discourse with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Discourse
Published: 2023-01-05
Last modified: 2026-06-17

Description

Discourse is an option source discussion platform. Prior to version 2.8.14 on the `stable` branch and version 3.0.0.beta16 on the `beta` and `tests-passed` branches, the number of times a user posted in an arbitrary topic is exposed to unauthorized users through the `/u/username.json` endpoint. The issue is patched in version 2.8.14 and 3.0.0.beta16. There is no known workaround.

Frequently asked questions

What is CVE-2023-22453?: Discourse is an option source discussion platform. Prior to version 2.8.14 on the `stable` branch and version 3.0.0.beta16 on the `beta` and `tests-passed` branches, the number of times a user posted in an arbitrary topic is exposed to unauthorized users through the `/u/username.json` endpoint. The issue is patched in version 2.8.14 and 3.0.0.beta16. There is no known workaround.
How severe is CVE-2023-22453?: CVE-2023-22453 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-22453 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-22453?: CVE-2023-22453 primarily affects Discourse. In total, 206 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-22453?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-22453 published?: CVE-2023-22453 was published on 2023-01-05 and last updated on 2026-06-17.

References

Affected products (206)

cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*
cpe:2.3:a:discourse:discourse:1.1.0:beta1:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.1.0:beta2:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.1.0:beta3:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.1.0:beta4:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.1.0:beta5:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.1.0:beta6:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.1.0:beta6b:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.1.0:beta7:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.1.0:beta8:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.2.0:beta1:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.2.0:beta2:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.2.0:beta3:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.2.0:beta4:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.2.0:beta5:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.2.0:beta6:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.2.0:beta7:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.2.0:beta8:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.2.0:beta9:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta1:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta10:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta11:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta2:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta3:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta4:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta5:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta6:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta7:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta8:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.3.0:beta9:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.4.0:beta1:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.4.0:beta10:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.4.0:beta11:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.4.0:beta12:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.4.0:beta2:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.4.0:beta3:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.4.0:beta4:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.4.0:beta5:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.4.0:beta6:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:1.4.0:beta7:*:*:beta:*:*:*

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