How severe is CVE-2023-0549?

CVE-2023-0549 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2023-0549 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-0549?

CVE-2023-0549 affects Yetanotherforum Yaf.net. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-0549?

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

When was CVE-2023-0549 published?

CVE-2023-0549 was published on 2023-01-27 and last updated on 2026-06-17.

CVE-2023-0549

CVE-2023-0549 is a low-severity vulnerability in Yetanotherforum Yaf.net with a CVSS 3.x base score of 3.5. 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-79.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Yetanotherforum Yaf.net
Published: 2023-01-27
Last modified: 2026-06-17

Description

A vulnerability, which was classified as problematic, has been found in YAFNET up to 3.1.10. This issue affects some unknown processing of the file /forum/PostPrivateMessage of the component Private Message Handler. The manipulation of the argument subject/message leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 3.1.11 is able to address this issue. The identifier of the patch is 2237a9d552e258a43570bb478a92a5505e7c8797. It is recommended to upgrade the affected component. The identifier VDB-219665 was assigned to this vulnerability.

Frequently asked questions

What is CVE-2023-0549?: A vulnerability, which was classified as problematic, has been found in YAFNET up to 3.1.10. This issue affects some unknown processing of the file /forum/PostPrivateMessage of the component Private Message Handler. The manipulation of the argument subject/message leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 3.1.11 is able to address this issue. The identifier of the patch is 2237a9d552e258a43570bb478a92a5505e7c8797. It is recommended to upgrade the affected component. The identifier VDB-219665 was assigned to this vulnerability.
How severe is CVE-2023-0549?: CVE-2023-0549 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2023-0549 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-0549?: CVE-2023-0549 affects Yetanotherforum Yaf.net. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-0549?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-0549 published?: CVE-2023-0549 was published on 2023-01-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:yetanotherforum:yaf.net:*:*:*:*:*:*:*:*

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