VulnerabilityModified
CVE-2021-27889
Cross-site Scripting (XSS) vulnerability in MyBB before 1.8.26 via Nested Auto URL when parsing messages.
MEDIUM 6.1EPSS 5.07%
Does this matter?
Lower severity and a low EPSS score (5.07%). Track it; it rarely justifies an emergency change on its own.
Description
Cross-site Scripting (XSS) vulnerability in MyBB before 1.8.26 via Nested Auto URL when parsing messages.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 5.07% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- mybb/mybb
- Source
- cve@mitre.org
References
- http://packetstormsecurity.com/files/161908/MyBB-1.8.25-Remote-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://blog.sonarsource.com/mybb-remote-code-execution-chainExploit, Third Party Advisory
- https://github.com/mybb/mybb/security/advisories/GHSA-xhj7-3349-mqcmPatch, Third Party Advisory
- http://packetstormsecurity.com/files/161908/MyBB-1.8.25-Remote-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://blog.sonarsource.com/mybb-remote-code-execution-chainExploit, Third Party Advisory
- https://github.com/mybb/mybb/security/advisories/GHSA-xhj7-3349-mqcmPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.