medium CVSS 5.9

CVE-2025-1735·PHP vulnerability

In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* pgsql and pdo_pgsql escaping functions do not check if the underlying quoting functions returned errors. This could cause crashes if Postgres server rejects the string as invalid.

Severity
medium
Software
PHP
Fixed in
8.4.10
Published
2025-07-13

Affected versions

From: 8.4.0

Until: 8.4.10

Fixed in: 8.4.10

How to fix this CVE

Update PHP to version 8.4.10 or later to resolve a critical issue where PostgreSQL and PDO PostgreSQL escaping functions fail to validate error responses from the database server. Without this fix, malformed or rejected strings can trigger application crashes. Administrators should prioritize patching systems running PHP 8.4.0 through 8.4.9 that use PostgreSQL database connections.

sudo dnf update php

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check installed PHP version by running: php -v
  2. Step 2: Verify if pgsql or pdo_pgsql extensions are loaded by running: php -m | grep -i pgsql
  3. Step 3: Search application logs for repeated database connection errors or 'pgsql' related segmentation faults: grep -i 'segfault\|pgsql.*error' /var/log/apache2/error.log or /var/log/nginx/error.log
  4. Step 4: After patching, confirm the new version is active by running: php -v and restarting the web service: sudo systemctl restart apache2 (or nginx)

FAQ

What is CVE-2025-1735?

This vulnerability affects PHP's PostgreSQL database extensions, where error handling functions do not properly detect when the database server rejects or fails to process string values, leading to potential application crashes.

Is CVE-2025-1735 being actively exploited?

No, according to CISA's Known Exploited Vulnerabilities catalog, CVE-2025-1735 is not currently being actively exploited in the wild and no public exploit code has been disclosed.

What versions of PHP are affected by CVE-2025-1735?

PHP 8.4.0 through 8.4.9 are affected; PHP 8.4.10 and later contain the fix. Earlier major versions (8.1, 8.2, 8.3) may have equivalent patches in their respective update cycles.

How do I check if my server is vulnerable to CVE-2025-1735?

Run 'php -v' to determine your installed version, then check if it falls within the vulnerable range (8.4.0–8.4.9). Additionally, run 'php -m | grep -i pgsql' to confirm PostgreSQL extensions are in use.

Does Defensia detect CVE-2025-1735?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If PHP is installed on a monitored server, CVE-2025-1735 will appear in your dashboard with remediation steps.

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References

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