CVE-2020-25445: The “Subscribe” feature in Ultimate Booking System Booking Core 1.7.0 is vulnerable to CSV formula injection

This month

HIGH 7.8DOWNGRADE

CVE-2020-25445 is a high-severity flaw (CVSS 7.8) affecting booking core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The “Subscribe” feature in Ultimate Booking System Booking Core 1.7.0 is vulnerable to CSV formula injection. The input containing the excel formula is not being sanitized by the application. As a result when admin in backend download and open the csv, content of the cells are executed.

Why this priority

High severity

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-1236
Published	2021-07-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bookingcore

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

Am I affected?

Timeline

2021-07-14 15:15 UTCPublished CVE record published
2026-06-17 03:06 UTCUpdated Record last modified

bookingcore booking core DOWNGRADE

Affected: 1.7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.0

1. Check installed version

apt-cache policy booking-core || rpm -q booking-core || booking-core --version

2. No fixed release: DOWNGRADE to a release before 1.7.0 (Debian / Ubuntu)

apt-cache madison booking-core sudo apt install booking-core=<VERSION_BEFORE_1.7.0> sudo apt-mark hold booking-core

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

dnf --showduplicates list booking-core sudo dnf downgrade booking-core-<VERSION_BEFORE_1.7.0> sudo dnf versionlock add booking-core

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-2020-25445?

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

Is CVE-2020-25445 being exploited?

CVE-2020-25445 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-2020-25445 affect?

CVE-2020-25445 affects booking core. Severity is high (CVSS 7.8). The “Subscribe” feature in Ultimate Booking System Booking Core 1.7.0 is vulnerable to CSV formula injection. The input containing the excel formula is not being sanitized by the application. As a result when admin in backend download and o

How urgent is CVE-2020-25445?

Priority 42/100. High severity

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References

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