CVE-2021-47931

Exponent CMS 2.6 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts through the Title and Text Block parameters in the text editing endpoint. Attackers can inject iframe payloads with embedded SVG onload events to execute arbitrary JavaScript. The application also exposes database credentials in responses and lacks brute-force protection on authentication endpoints.

CVSS v4.0

5.1 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

6.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS

0.21% chance of exploitation in the next 30 days, 12th percentile

Published

2026-05-10

Updated

2026-05-26

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/50611

References

• CVE Record
• NVD entry

Related

• CVE-2021-47930
• CVE-2021-47932
• CVE-2021-47929
• CVE-2021-47933
• CVE-2021-47928
• CVE-2021-47934