CVE-2023-53932: Serendipity 2.4.0 contains a stored cross-site scripting vulnerability that allows authenticated users to inje

Routine

MEDIUM 5.4DOWNGRADE

CVE-2023-53932 is a medium-severity flaw (CVSS 5.4) affecting serendipity. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Serendipity 2.4.0 contains a stored cross-site scripting vulnerability that allows authenticated users to inject malicious scripts through blog entry creation. Attackers can craft entries with JavaScript payloads that will execute when other users view the compromised blog post.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-12-17
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: s9y

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

Am I affected?

Timeline

2025-12-17 23:15 UTCPublished CVE record published
2026-06-17 06:46 UTCUpdated Record last modified

s9y serendipity DOWNGRADE

Affected: 2.4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.4.0 (Debian / Ubuntu)

apt-cache madison serendipity sudo apt install serendipity=<VERSION_BEFORE_2.4.0> sudo apt-mark hold serendipity

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list serendipity sudo dnf downgrade serendipity-<VERSION_BEFORE_2.4.0> sudo dnf versionlock add serendipity

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2023-53932?

serendipity: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-53932 being exploited?

CVE-2023-53932 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-2023-53932 affect?

CVE-2023-53932 affects serendipity. Severity is medium (CVSS 5.4). Serendipity 2.4.0 contains a stored cross-site scripting vulnerability that allows authenticated users to inject malicious scripts through blog entry creation. Attackers can craft entries with JavaScript payloads that will execute when othe

How urgent is CVE-2023-53932?

Priority 28/100. Public exploit reference

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CVE-2023-53933 HIGH 8.8 DOWNGRADE Serendipity 2.4.0 contains a remote code execution vulnerability that allows authenticated attackers to upload
CVE-2023-31576 HIGH 8.8 DOWNGRADE An arbitrary file upload vulnerability in Serendipity 2.4-beta1 allows attackers to execute arbitrary code via

References

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