CVE-2023-27499Network attack vector

Reflected XSS via insufficient input encoding

Published Apr 11, 2023 · Updated Feb 7, 2025

Reflected XSS in SAP GUI for HTML kernel releases allows remote attackers to read or modify browser data through a malicious URL. The HTML response path insufficiently encodes user-controlled URL input before returning it to the browser, where injected script executes. Exploitation requires a victim to click the crafted link; the script then runs in that victim’s browser context and can read, alter, or transmit browser data.

CVSS severity6.1
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in SAP GUI for HTML kernel releases allows remote attackers to read or modify browser data through a malicious URL. The HTML response path insufficiently encodes user-controlled URL input before returning it to the browser, where injected script executes. Exploitation requires a victim to click the crafted link; the script then runs in that victim’s browser context and can read, alter, or transmit browser data.

The record

CVE
CVE-2023-27499
Published
Apr 11, 2023
Updated
Feb 7, 2025
Vendor
SAP SE
Product
SAP GUI for HTML
Classifications
CWE-79, CAPEC-591, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=KERNEL 7.22
  2. Affected versionversion=KERNEL 7.53
  3. Affected versionversion=KERNEL 7.54
  4. Affected versionversion=KERNEL 7.77
  5. Affected versionversion=KERNEL 7.81
  6. Affected versionversion=KERNEL 7.85
  7. Affected versionversion=KERNEL 7.89
  8. Affected versionversion=KERNEL 7.91
  9. Affected versionversion=KRNL64NUC 7.22
  10. Affected versionversion=KRNL64NUC 7.22EXT
  11. Affected versionversion=KRNL64UC 7.22
  12. Affected versionversion=KRNL64UC 7.22EXT
  13. Affected versionversion=KRNL64UC 7.53

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SAP SE · SAP GUI for HTMLversion=KERNEL 7.22; version=KERNEL 7.53; version=KERNEL 7.54; version=KERNEL 7.77; version=KERNEL 7.81; version=KERNEL 7.85; version=KERNEL 7.89; version=KERNEL 7.91; version=KRNL64NUC 7.22; version=KRNL64NUC 7.22EXT; version=KRNL64UC 7.22; version=KRNL64UC 7.22EXT; version=KRNL64UC 7.53

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1SAP SECVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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