CVE-2026-90540: Auth Bypass (CVSS 4.3)

Description

WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 fails to validate watch permissions in the playListAddVideo.json.php endpoint when adding videos to playlists. Authenticated attackers can add password-protected videos they cannot watch to playlists they own by submitting the video ID and playlist ID parameters.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

0.0016

Probability of exploitation

0.05%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-862 Missing Authorization

References

Other References

https://github.com/WWBN/AVideo/security/advisories/GHSA-xhg9-rc5h-rp65 https://www.vulncheck.com/advisories/wwbn-avideo-missing-authorization-via-playlistaddvideo-json-php https://github.com/WWBN/AVideo/security/advisories/GHSA-xhg9-rc5h-rp65

Frequently Asked Questions

What is CVE-2026-90540? +

WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 fails to validate watch permissions in the playListAddVideo.json.php endpoint when adding videos to playlists. Authenticated attackers can add password-protected videos they cannot watch to playlists they own by submitting the video ID and playlist ID parameters. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-90540? +

CVE-2026-90540 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0016, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-90540? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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