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Fencer Vulns
medium 6.9

CVE-2021-33691 json

NWDI Notification Service versions - 7.31, 7.40, 7.50, does not sufficiently encode user-controlled inputs, resulting in Cross-Site Scripti…

published 2021-09-15 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-20368

cvss
6.9
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

NWDI Notification Service versions - 7.31, 7.40, 7.50, does not sufficiently encode user-controlled inputs, resulting in Cross-Site Scripting (XSS) vulnerability.SAP NetWeaver Development Infrastructure Notification Service allows a threat actor to send crafted scripts to a victim. If the victim has an active session when the crafted script gets executed, the threat actor could compromise information in victims session, and gain access to some sensitive information also.

Patch / fix

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 6.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • SAP SE SAP NetWeaver Development Infrastructure (Notification Service)

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.