How severe is CVE-2008-1502?

No CVSS score has been assigned to CVE-2008-1502 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2008-1502?

CVE-2008-1502 affects the following packages: moodle/moodle (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2008-1502?

Update moodle/moodle to 1.8.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2008-1502 is resolved across your whole dependency graph.

How do I detect CVE-2008-1502 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for moodle/moodle, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2008-1502 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2008-1502 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2008-1502, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2008-1502?

CVE-2008-1502 has an EPSS (Exploit Prediction Scoring System) score of 10.5%, placing it in the 96th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

What type of vulnerability is CVE-2008-1502?

CVE-2008-1502 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2008-1502 published, and has it been updated?

CVE-2008-1502 was published on March 25, 2008 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

CVE-2008-1502 — moodle

CVE-2008-1502 is a Cross-site Scripting (XSS) vulnerability in moodle/moodle. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for moodle/moodle — see the affected versions and patch details below.

Moodle vulnerable to Cross-site scripting

Also known asGHSA-v759-3wr5-p294

Published

Mar 25, 2008

Updated

Apr 10, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

10.5%probability of exploitation in next 30 days

Moderate Risk0.00%

Lower risk than most CVEs96th percentile — riskier than 96% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐘moodle/moodle

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

The _bad_protocol_once function in phpgwapi/inc/class.kses.inc.php in KSES, as used in eGroupWare before 1.4.003, Moodle before 1.8.5, and other products, allows remote attackers to bypass HTML filtering and conduct cross-site scripting (XSS) attacks via a string containing crafted URL protocols.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`moodle/moodle`	all versions	1.8.5`composer require moodle/moodle:^1.8.5`

Affected Products

2 products · 43 configurations

Application

egroupwareegroupware

≤ 1.4.002

6 versions

1.01.0.11.0.31.0.61.2.106-21.4.001

Application

moodlemoodle

≤ 1.8.4

35 versions

1.1.11.2.01.2.11.3.01.3.11.3.21.3.31.3.41.4.11.4.21.4.31.4.4

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

The _bad_protocol_once function in phpgwapi/inc/class.kses.inc.php in KS…

egroupware.orgNVDDec 2020

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for moodle/moodle, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update moodle/moodle to 1.8.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2008-1502 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Ubuntu

USN-658-1Ubuntu

Frequently Asked Questions

O3 Security · Impact-Aware SCA

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