CVE-2025-63848: Stored cross site scripting (xss) vulnerability in SWISH prolog thru 2.2.0 allowing attackers to execute arbit

Q: How do I fix CVE-2025-63848?

swish: upgrade to newer than 2.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-63848 being exploited?

CVE-2025-63848 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-63848 affect?

CVE-2025-63848 affects swish. Severity is medium (CVSS 6.1). Stored cross site scripting (xss) vulnerability in SWISH prolog thru 2.2.0 allowing attackers to execute arbitrary code via crafted web IDE notebook.

Q: How urgent is CVE-2025-63848?

Priority 24/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2025-63848 is a medium-severity flaw (CVSS 6.1) affecting swish. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stored cross site scripting (xss) vulnerability in SWISH prolog thru 2.2.0 allowing attackers to execute arbitrary code via crafted web IDE notebook.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-11-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: swi-prolog

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-20 17:15 UTCPublished CVE record published
2026-06-17 09:53 UTCUpdated Record last modified

swi-prolog swish UPGRADE

Affected: <= 2.2.0

Fixed in: newer than 2.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy swish || rpm -q swish || swish --version

2. UPGRADE to newer than 2.2.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade swish

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade swish

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-63848?

swish: upgrade to newer than 2.2.0. Exact commands for each OS are on this page.

Is CVE-2025-63848 being exploited?

CVE-2025-63848 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-63848 affect?

CVE-2025-63848 affects swish. Severity is medium (CVSS 6.1). Stored cross site scripting (xss) vulnerability in SWISH prolog thru 2.2.0 allowing attackers to execute arbitrary code via crafted web IDE notebook.

How urgent is CVE-2025-63848?

Priority 24/100. No elevated risk signals yet.

References

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