What is CVE-2019-15532?

CVE-2019-15532 is a medium-severity vulnerability in Gchq Cyberchef, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-08-26.

How severe is CVE-2019-15532?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2019-15532 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Gchq Cyberchef

CVE-2019-15532

CyberChef before 8.31.2 allows XSS in core/operations/TextEncodingBruteForce.mjs.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.5th percentile), scored 2026-09-26.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Gchq Cyberchef

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ossf-cve-benchmark/CVE-2019-15532

References

github.com/gchq/CyberChef/issues/544 (Patch, Third Party Advisory, Issue Tracking)
github.com/gchq/CyberChef/issues/539 (Exploit, Third Party Advisory)
github.com/gchq/CyberChef/commit/01f0625d6a177f9c5df9281f12a27c814c2d8bcf (Patch, Third Party Advisory)
github.com/gchq/CyberChef/compare/v8.31.1...v8.31.2 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-15532?: CVE-2019-15532 is a medium-severity vulnerability in Gchq Cyberchef, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-08-26.
How severe is CVE-2019-15532?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2019-15532 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.