How severe is CVE-2023-43798?

CVE-2023-43798 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-43798 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-43798?

CVE-2023-43798 primarily affects Bigbluebutton. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-43798?

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

When was CVE-2023-43798 published?

CVE-2023-43798 was published on 2023-10-30 and last updated on 2026-06-17.

CVE-2023-43798

CVE-2023-43798 is a medium-severity vulnerability in Bigbluebutton with a CVSS 3.x base score of 5.6. 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-918.

Key facts

Severity: Medium (CVSS 3.x base score 5.6)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Bigbluebutton
Published: 2023-10-30
Last modified: 2026-06-17

Description

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to versions 2.6.12 and 2.7.0-rc.1 is vulnerable to Server-Side Request Forgery (SSRF). This issue is a bypass of CVE-2023-33176. A patch in versions 2.6.12 and 2.7.0-rc.1 disabled follow redirect at `httpclient.execute` since the software no longer has to follow it when using `finalUrl`. There are no known workarounds. We recommend upgrading to a patched version of BigBlueButton.

Frequently asked questions

What is CVE-2023-43798?: BigBlueButton is an open-source virtual classroom. BigBlueButton prior to versions 2.6.12 and 2.7.0-rc.1 is vulnerable to Server-Side Request Forgery (SSRF). This issue is a bypass of CVE-2023-33176. A patch in versions 2.6.12 and 2.7.0-rc.1 disabled follow redirect at `httpclient.execute` since the software no longer has to follow it when using `finalUrl`. There are no known workarounds. We recommend upgrading to a patched version of BigBlueButton.
How severe is CVE-2023-43798?: CVE-2023-43798 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-43798 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-43798?: CVE-2023-43798 primarily affects Bigbluebutton. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-43798?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-43798 published?: CVE-2023-43798 was published on 2023-10-30 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.7.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.7.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.7.0:alpha3:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.7.0:beta1:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.7.0:beta2:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.7.0:beta3:*:*:*:*:*:*

More vulnerabilities in Bigbluebutton

CVE-2020-27602 — Critical (CVSS 9.8): BigBlueButton before 2.2.7 does not have a protection mechanism for separator injection in meetingId, userId, and…
CVE-2020-27605 — Critical (CVSS 9.8): BigBlueButton through 2.2.28 uses Ghostscript for processing of uploaded EPS documents, and consequently may be subject…
CVE-2020-12443 — Critical (CVSS 9.8): BigBlueButton before 2.2.6 allows remote attackers to read arbitrary files because the presfilename (lowercase) value…
CVE-2020-27613 — High (CVSS 8.4): The installation procedure in BigBlueButton before 2.2.28 (or earlier) uses ClueCon as the FreeSWITCH password, which…
CVE-2025-61602 — High (CVSS 7.5): BigBlueButton is an open-source virtual classroom. A denial-of-service (DoS) vulnerability in versions prior to 3.0.13…
CVE-2025-61601 — High (CVSS 7.5): BigBlueButton is an open-source virtual classroom. A Denial of Service (DoS) vulnerability in versions prior to 3.0.13…

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