CVE-2023-53905: ProjectSend r1605 contains a CSV injection vulnerability that allows authenticated users to inject malicious f

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HIGH 8.0DOWNGRADE

CVE-2023-53905 is a high-severity flaw (CVSS 8.0) affecting projectsend. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ProjectSend r1605 contains a CSV injection vulnerability that allows authenticated users to inject malicious formulas into user profile names. Attackers can craft payloads like =calc|a!z| in the name field to trigger code execution when administrators export action logs as CSV files.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-1236
Published	2025-12-17
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: projectsend

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

projectsend projectsend DOWNGRADE

Affected: r1605

Fixed in: no fixed release known

Safe to downgrade to: a release before r1605

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before r1605 (Debian / Ubuntu)

apt-cache madison projectsend sudo apt install projectsend=<VERSION_BEFORE_r1605> sudo apt-mark hold projectsend

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

dnf --showduplicates list projectsend sudo dnf downgrade projectsend-<VERSION_BEFORE_r1605> sudo dnf versionlock add projectsend

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-2023-53905?

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

Is CVE-2023-53905 being exploited?

CVE-2023-53905 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-2023-53905 affect?

CVE-2023-53905 affects projectsend. Severity is high (CVSS 8.0). ProjectSend r1605 contains a CSV injection vulnerability that allows authenticated users to inject malicious formulas into user profile names. Attackers can craft payloads like =calc|a!z| in the name field to trigger code execution when adm

How urgent is CVE-2023-53905?

Priority 44/100. High severity; Public exploit reference

Related CVEs

CVE-2024-11680 CRITICAL 9.8 EXPLOITED UPGRADE ProjectSend Improper Authentication Vulnerability
CVE-2024-7659 LOW 3.7 UPGRADE A vulnerability, which was classified as problematic, was found in projectsend up to r1605
CVE-2024-7658 MEDIUM 5.3 UPGRADE A vulnerability, which was classified as problematic, has been found in projectsend up to r1605
CVE-2023-53980 CRITICAL 9.8 DOWNGRADE ProjectSend r1605 contains a remote code execution vulnerability that allows attackers to upload malicious fil
CVE-2023-53930 HIGH 7.5 DOWNGRADE ProjectSend r1605 contains an insecure direct object reference vulnerability that allows unauthenticated attac

References

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