CVE-2021-27889
CVE-2021-27889
No sign of exploitation. has a public proof of concept.
Vexday Risk Score
23Low
SSVC decision (CISA)
Attend
PoC available → attend closely
Exploit maturity
Proof of concept
Public proof of concept exists, but not yet automated.
CVSS —EPSS 5.1%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
15 Mar 2021Published on NVD
22 Mar 2021Public PoC
Weaponization speed
6 daysto first PoC
Weaponized quickly — attackers prioritized this vulnerability. Patch urgently.
Recommendation: Plan a near-term fix — a public PoC already exists.
Cross-site Scripting (XSS) vulnerability in MyBB before 1.8.26 via Nested Auto URL when parsing messages.
Affected products
n/a · n/apublic PoCs found — 2
cve_referencepacketstormsecurity.com/files/161908/MyBB-1.8.25-Remote-Command-Execution.htmlunverifiedexploitdbwww.exploit-db.com/exploits/49696unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.